Building a housing budget calculator

Moving back to Copenhagen means finding a place. And finding a place means staring at numbers that don't make sense until you lay them all out.

The core question: furnished apartment with storage container, or unfurnished apartment with my own furniture and no container? They're not directly comparable. Different move-in costs, different monthly costs, different trade-offs depending on how long you stay.

So I built a calculator.

It's a single HTML file -- no framework, no backend, no dependencies. Two columns side by side: Option A and Option B. You enter the rent, deposit, prepaid rent, aconto, and boligstøtte for each, toggle whether the container storage cost applies, and the numbers update instantly.

The move-in cost took a quick correction. My first version added only deposit + prepaid rent. But the real indflytningspris -- the Danish move-in price -- includes first month's rent and first month's aconto on top of that. One screenshot from BoligPortal fixed that.

The result is a clean comparison: total move-in cost, monthly cost as configured, monthly cost excluding the container, and a callout at the bottom that names the cheaper option and by exactly how much.

It lives in the Workshop. I'll use it this month.