I think it is a pain to have these things to sort out regardless what the they are for (general mantance )or not .
But my questions would be what did the car cost you in the first place as this would help with weather or not its worth cutting your loses or not also how much you thinking it will cost to get the car up to 100% .
If you got the car cheap knowing these problems then your just going to have to suck it up but if you paid full price and got stuck with this then I can see your point and would be concidering cutting out here as well .
Good luck
Also painting a car for 1200.00 is hard to believe product alone will cost more than that on its own and if you can get that I wouldn't be to confident on the quality .