you are setting yourself up for getting fucked with that "full time" thinking... more likely than not, that bargain full time programmer will turn into you getting jerked around for months, and when all is said and done, you will burn through 2x your budget and end up with a half complete script...
your best bet is put together detailed specs and then get quotes from programmers on per project basis... then pick one that has a good balance of price/experience/recommendations/etc not just the cheapest... as usually the cheapest one is cheapest for a reason...
