Potential tenant that is in the process of divorce.

[Jennifer Dejoyvor]

Hello all, I just bought a rental property in long island and came across a potential tenant that she said is going through a divorce and need an apartment. My rental is asking for $2600/mo. She is self employed and making around $2000 a month (proved by bank statement), alimony $2000 a month and her son in law is an electrician making $3000 a month(paystub, tax return). However, Only the son in law has credit score 700+. The other family members do not have credit at all. And since she is going through a divorce, according to her, she needs to find another apartment so that they can live separately in order for the alimonyto start. As for the alimony, she has a letter from her husband stating that he will pay $2000 a month to support her and it is notarized. 

What do you guys think? Without the alimony payment, they can barely meet 3x rent. But there is no way to prove it as it has not started yet. Is the notarized letter sufficient? Maybe I should ask for double deposit? Ask the ex husband as cosign or guarantor? Is there anything else I can ask for to prove that they will get this extra income?