There are a few extra factors at play here,
- Our price is somewhat anchored by the accounting packages we integrate with, but we do intend to try and push that price up eventually (I should add: by adding more powerful features, rather than just hiking it).
- We offer founder plans for people keen to support us (think kickstarter) which works out about 2-3 worth of lifetime value up front, and has really helped us month-to-month.
- I was still working a full-time, then part-time, job for the first 10 months or so. - We were partly incubated for a year or so by my co-founder's web design company, which allowed him to keep drawing a salary from that and gave us an effectively free office. Although we are now both full-time on Float.
- We've spent a number of our weekends this year helping start an incubation space (by literally knocking down walls) which has got us free office space while it's being finished off (http://techcube-ed.tumblr.com/).
- We have raised a tiny amount of money, which obviously helps.
- We live in Scotland which I am sure has a much lower cost of living than London/the Valley.
- I have a _very_ supportive wife who works full-time.