A few people have suggested I set up the ability for people to donate to me to cover the time spent building NeoInvoice. So, here it is!
I spent about 2 years building NeoInvoice. After the number of hours spent on the project (at least 1,000) and the amount of code that I wrote for it (over 10,000 lines) I felt the project would much better help the world by having it open sourced, instead of just closing the site forever. The source code is now available on GitHub:
Hosting has cost about $1,000 ($45 / month * 48 months). If I could make that much in donations, that would be awesome, as I would be able to break even with this project.