Doors

1. Open index.html directly in any modern browser — nothing to install, no server, no internet connection needed after the page loads (Google Fonts is the only external request).
2. The top tab row holds your properties on the left (starting with Property 1). About and this Help tab live above it, in the header, right-aligned next to the theme switch and text-size buttons — the last two are the same regardless of how many properties you've added, since they document the tool itself rather than any one property's numbers.
3. The page opens on the first property's Dashboard sub-tab, showing whatever scenario loaded by default. Each property has its own Dashboard, Conditions and Terms sub-tabs.

1. Pick a City next to the Property name/address field first (Ottawa or Gatineau) — presets use it to scale price, rent and property tax for that market.
2. Open the Terms tab. The Preset scenario dropdown is grouped by property type, then by location and accessibility tier within each type.
3. Click ↻ Reload preset at any time to snap every field back to that preset's defaults (re-scaled for whichever City is currently set), discarding any edits you've made since.

1. Open the Conditions tab.
2. Pick a Building type — this sets sensible defaults for cap rate band, CapEx reserve, HOA and insurance over on the Terms tab (still fully editable there).
3. Set utility metering (who pays hydro/water/gas) and any other categorical conditions — the half-year rule and so on.

1. Open the Terms tab and expand any of its eight sections: Property, Financing (financing method and up to two refinances), Revenue & Premiums, Vacancy & Turnover, Utility Rates, Operating Expenses, Cash Flow Modeling, and CCA & Tax.
2. Every numeric field is editable directly — type a new value and the whole model recalculates immediately.
3. Some fields appear dimmed and disabled depending on another setting (e.g. down payment while self-financed) — the hint text under a greyed-out field names which control it.

1. The three KPI cards at the top read left to right as a narrative: what the property makes today (Monthly Cash Flow), how good a deal that is (Return metrics), and what it builds over the full term (Wealth Growth).
2. The Revenue to Cash Flow card below shows the same numbers two ways: a flow diagram (Sankey) and a by-line-item bar list.
3. Five charts further down project market value, equity, revenue & expenses (a stacked area for every individual line item), cash flow, mortgage payment, and the CapEx reserve across the full financing term — use the checkboxes above each chart to show or hide individual lines.

1. On the Dashboard, use the Show figures as dropdown to rescale every dollar figure — Bi-Weekly, Monthly, a number of years, and so on.
2. Cap rate, cash-on-cash and DSCR never rescale — they're ratios, always shown annualized regardless of this setting.

1. Each of the three term-projection charts has its own dual-handle slider directly below it.
2. Drag either handle to crop the chart to a sub-window of the financing term (e.g. years 5–10) — both axes rescale to that window automatically.
3. Drag the handles back out to the full span to zoom back out — there's no separate reset button.

1. Click + Add property in the tab bar (up to 5 properties at once).
2. Give each property a name in the field above its Dashboard/Conditions/Terms sub-tabs — it updates that property's own tab label immediately.
3. Once 2 or more properties exist, a Compare tab appears next to them (About/Property/Settings/Help/Profile stay up in the header, unaffected) with every property's key measures side by side, on a fixed monthly/annual basis regardless of each property's own period selector.

1. Click the switch in the header, next to About and Help, to toggle between light and dark — both a sun and a moon are always shown, and the slider sits over whichever one is currently active.
2. Your choice is saved in the browser and wins over your system's light/dark setting from then on.
3. Before your first click, the page follows your operating system's setting automatically, including live changes to it.

1. On your Android phone, open Chrome and go to 4bekzod.github.io/Doors — installing to a home screen only works once the tool is loaded over a real web address (https://), not opened as a local file.
2. Tap the ⋮ (three-dot) menu in Chrome's top-right corner, then tap Install app. If that option isn't there, tap Add to Home screen instead — either one adds the same icon.
3. Confirm in the dialog that pops up (it shows the app's name and icon) by tapping Install (or Add).
4. The icon now sits on your home screen. Tapping it opens the tool full-screen, with no browser address bar — and once you've opened it there at least once, it keeps working without a signal.

Illustrative Ottawa–Gatineau market figures behind the defaults — every one of them is editable on the Terms tab.

The calculation runs in one direction, stage by stage — each stage matches a section of the Dashboard's flow diagram:

1. Revenue — base rent plus location/transit premiums and add-on income, totalled into Gross Potential Rent (GPR).
2. Vacancy — GPR minus vacancy & credit loss leaves Effective Gross Income (EGI).
3. Operating expenses — property tax, insurance, HOA, management, CapEx reserve, leasing friction and more, subtracted from EGI to leave Net Operating Income (NOI).
4. Debt service — the mortgage payment(s), including any active refinance, subtracted from NOI to leave Cash Flow Before Tax.
5. CCA & tax — an illustrative depreciation deduction and marginal tax rate applied to estimate After-Tax Cash Flow.
6. Over the term — the same drivers projected year by year to show property value, mortgage balance, equity and cash flow evolving across the full financing term.