I think it is really important to be realistic. When our first cycle was cancelled on the day of our 'transfer' we were devastated. We were lucky enough to have a good chat with our FS over the phone that day. She said we were in for the long haul and that it could be costly. The next time we saw her she mentioned the possibilty of using an egg donor.
After our second failed cycle we made a plan. Try everything - diet, acupuncture, DHEA, supplements - and then try one more cycle. If it fails, look into egg donation.
It failed. We start our egg donor cycle in July. We're happy.
There is no way I'm going to put my life on hold for more IVF cycles. I hate the emotional rollercoaster. I don't need a child that has a biological link to me but it did take me a while to come to that realisation.
Strangely enough, we are now about to foster DH's 5 year old cousin. Just having her around on weekends has shown us that we can develop a strong bond with a child even if it doesn't have a biological link to us.