The cost of the meds are the least of your worries love. I found them to be surprisingly cheap. The other day I got 10 Gonal-F pens for $37 total, 1 Ovidrel Pen for $37, and seven Orgalutran injections for $37 total. Clomid is cheap as chips too.
@Tahli, can I ask you a really stupid question? You and your ex seem to have a pretty reasonable relationship and he has been accommodating of your financial situation re IVF. Is there any chance at all he would consider donating some sperm? Even if you drew up a contract stating he would not be financially responsible for the child, it might give you an option to be able to try naturally (well, as naturally as you can with a turkey baster) in between CT trips etc.
It sounds more stupid after I've written it down. Sorry!