This can all change with marriage and kids, but I look forward to enjoying that part of life only once I've built a solid foundation to build that family on. 

Cost of my marriage, cost of my health, cost of enjoying life? 

This is true if they are married, dating, or just friends.When renting to three or more individuals that are not related by blood or marriage, then I increase my standards so that each individual makes at least 2x the rent and has a credit score of 650.

Does she have to subpoena me as a witness or am I actually a plaintiff via marriage?

I'd tip my cap, congratulate them on the pending marriage and move on. 

Their bankruptcy was for personal, poor money management reasons from a prev marriage, not anything business related, it was actually just under 10 years ago, so it will probably be cleared soon. 

I'm not unsympathetic but I have my own financial commitments to worry about that don't subside because someone else's marriage broke up. 

On the other points I am not sure we should vet this girls entire life who know how many people apply and don't tell you their marriage plans and that the BF will be moving to town someday.

Needed for the following...Marriage - drivers license (and a cubic zirconia)Investment property - attorney, PPM, and $10k...

Yeah, that one kind of went off the rails with Calif recognizing an unrecorded marriage etc.