how many motile sperm for your IUI's?

Liz • Miracle baby 2012. Currently 5+ years TTC - 10 failed IUI - 1 failed fresh IVF - 1 failed donor embryo FET - next up: FET #2 September 2018
DONOR SPERM: I'm so overwhelmed! Our RE wants 20mil but each vial is only 10mil minimum, so I guess we have to use 2 of the 3 we bought for ONE cycle. What have you all done? I'm ready to cry. It's been 4 years. Now we're using donor sperm and it's all new and confusing. And obviously two vials drastically increases the cost, which were already nickel and diming every possible place we can in our budget. *sigh* why is this so hard? 😞😣