I discovered the best invention ever last year after renovating an investment flat.
The place hadn't been touched (or cleaned) since the 70s and we didn't want to spend too much cos it was going to be a rental.
To make the bathroom look pretty we repainted the tiles using a special paint you can get at the hardware. It cost about $100 and turned the pink, brown and orange tiles to a nice vanilla colour
We also repainted the fake wood grain kitchen cupboards using a laminate paint, total cost was about $70 but kitchen was transformed!
In all it took us about 6 weeks from start to finish to get the place decent- like everyone says be prepared to give up your weekends and evenings, and avoid doing it with the other half/ family if you can help it!
I personally loved it and can't wait to do another one.