So, quick one - everything is free.
I've decided to switch off the authentication server and just run HouseQuests for free. The repo code will still be private for now, but essentially you don't need to pay for anything anymore. Have fun! (Oh, and I fixed a Zoopla bug).
The housequests application was born from starting my journey on purchasing my first home.
I've quickly realised that bouncing around mulitple property websites and searching for what I wanted became more and more tedious. With weird filtering systems, truncated results, limited settings and non-existing features there must be a better way.