Smyth and Anxiously, the cost varies by clinic and depends on if insurance covers any of it. Some plans will cover the monitoring or the meds, but not the actual IUI or IVF itself. Some cover the whole thing (but there may be copays and/or coinsurance), and others cover NOTHING. The out of pocket cost for IUI where I go is 2000-3000 depending on how much monitoring you do. The meds (and this is with Rx benefits) was about $100. Happily, my insurance covers infertililty up to 10K, so for right now everything is covered. My previous policy had a 10% coinsurance, so I had to pay 10% of everything, but it wasn't bad at all. IVF at my place is 10K, and the meds run another 3-6K. That is if you have no insurance or Rx coverage at all.
Smyth, temping - you should do it at the same time everyday (within 30 minutes of your designated temp time). You should do it IMMEDIATELY upon waking up. You should not move around at all before taking your temp or during. Temperature changes in the room might change your temps slightly, but for me don't have a big impact really. Consistency is key - I pretty much always get up to pee in the middle of the night, but since I'm consistent with that, it doesn't affect my temps. After a month or two of temping, you'll see that your temps are probably pretty consistent. Look at my chart overlay to see an example. What you are looking for when temping is a sustained thermal shift (3 days of higher temps), that's what confirms ovulation (as best you can without progesterone tests and/or ultrasounds).