@willie23 It can take a healthy couple up to a year to conceive, so your sister is still well within what's "normal". Did her doctor tell her how removing the scar tissue would impact her fertility?
I had to have IVF with ICSI to get pregnant due to MFI, in our case low morphology. Despite being young, 28 at the time, my AMH (hormone that measures ovarian reserve) was as low as a normal 38 year old's. I was pretty much told we didn't have much time left and had to be aggressive with the IVF treatment. Despite my young age, our odds of conceiving were still only 40% - 50% per IVF cycle. Due to the low AMH, we only got 6 mature eggs. However, 3 of them made it to day 5 blastocysts! I got pregnant on our first IVF cycle with only one embryo transferred. I'm far from the norm though. Just from being on /r/infertility, I can tell you it takes some couples 3 or 4 IVF cycles to get pregnant, if they even get pregnant at all. It took Tom Arnold 21 IVF cycles to have his son! Did your brother's RE give them odds of conceiving?
As far as the cost of IVF, some insurance companies pay for it, some pay for a portion of it like office visits and blood work, and some don't pay at all. There are programs that will pay a portion of the costs; I think they're usually called "Shared Risk Programs".
Attain is probably the most popular one I've heard of. To qualify you have to be within a certain BMI, etc.
If egg quality is an issue, there's donor eggs. You said your brother's sperm count is normal. That's only one part of the semen analysis; the other two components are motility and morphology. Is your brother's entire SA normal or just the count? If both sperm and egg quality are an issue, there's donor embryos. Continuing to try is entirely up to them.
I'm just curious what protocol makes you take medication for 2 months. Typically, you start medications at the beginning of your cycle, have the egg retrieval near ovulation, and start taking progesterone and estrogen around the embryo transfer. If you don't get pregnant, you stop taking medication. That would last a total of about a month. If you do get pregnant, you continue taking progesterone and estrogen throughout your first trimester.
As far as emotional support, it's very common for couples suffering from infertility to seek help from a therapist who specializes in infertility. Their RE should be able to recommend one. If they want to talk to you about it, just listen. Let them cry, rant, etc. Don't suggest supplements, lifestyle changes, etc without actually researching them first to see if they're even efficacious. Even then I'd probably steer clear of that. Never say things like, "It's God's plan.", "It's for the best.", etc. These types of statements won't offer comfort. They'll just upset your brother and SIL more.