The one thing I would say when it comes to wrapping, all the discussions that have been had revolve around the conclusion of buy cheap buy twice - you will pay less initially but the quality of the vinyl will be lower and runs a high probability of looking shabby very quickly.
If price is a concern is there no chance you could address the paint job with polishes or are the imperfections right down to the metal - you could spend £400 get yourself completely kitted out with a DA polisher, mops and compound - clay bars etc if you do a great job you could possibly offer to do the same to your mates cars for a fee and re-coup some money.
Why dont you take a trip down to these chaps and have a chat - nice run in the sticks - check out their ebay stuff they have a full range but would probably be able to advise on treatments / approaches to your existing body work
http://www.ebay.co.uk/itm/120924962839
Claire & David Laschke
PerfectlyCleaned, Unit 14
Highgrove Farm Ind Est, Seaford
Pinvin, Pershore
Worcestershire
WR10 2LF
01905 841534