I budget £300 a month for rental costs, not counting landing fees, maps, Skydemon subs, pub lunches and all the other guff that goes with flying. I average around 70 hrs per year P1 on this and probably do around 120 hrs including RH seat. I do have a lot of non pilot friends who like to fly who cost share. This makes a massive difference, I very rarely fly on my own unless it's a servicing flight. In fact more often than not I'll stick someone in the RH seat if it's a servicing flight just for someone to talk to.