Suggestions for "adopted" daughter and her first home/rental

[Danette C.]

My oldest daughter's best friend (21 y.o.) is researching different types of loans for when it's time to pull the trigger and buy her first place.  So here are a couple of questions for those of you willing to give some suggestions:

Have any of you purchased a deal with FHA loan? If so, what are the pros and cons?

USDA loans only apply to rural areas, correct?  Once again, if you have purchased a home with one, what are the pros and cons?

If she finds a duplex, lives in one side and rents the other side, wouldn't it be in her best interest to purchase it as an LLC?

Again, thank you for your help as I don't want to steer her wrong.