Hi there, well I've done IVF and agree with Keen on how emotionally taxing it can be. The financial cost is nothing compared to that. It does play havoc with your hormones, but really how difficult it is just depends on whether you get a BFP or a BFN at the end and how prepared you and your DH are to cope with that. It is MUCH worse getting a BFN after IVF than with any other type of cycle, as you have invested so much into it, both with emotions, physically and financially. If you have a robust relationship and can both talk about the 'what if it doesn't happen' then you will be OK.

Good luck! I posted in the TTC with Metformin and Clomid thread as well (that is where I'm at the moment)... just remember you may not have to get to IVF, there are a number of steps before that to consider.