He’s offering me 7500 total once he sells Businesses turn friendships sour on many occasions.

So, as suggested, I'd just tell your friend that you're sorry, but you have a policy of never renting to friends or family, because it inevitably hurts the relationship and your friendship means too much to you.They'll try to make you change your mind, probably, but just do the broken record technique - keep repeating yourself.  

It's not a friendship, it's a friendly (hopefully) business transaction. 

If things go sour it will ruin your friendship and with acquaintances it makes the mutual friend(s) feel awkward.

Transunion has an option where the tenant pays for the reports - why not order them and see if you can verify at least $2,500 in regular income, no history of evictions, ever and I'd say maybe chance it but honestly you'll still be giving up your friendship.

And in real estate if someone is a bad person they will use their friendship with you to take advantage of you. 

And, if there ends up being a problem, your friendship will be in jeopardy.I'd suggest looking for another property not owned by anyone you know.

Your friendship or the deal?

I'm looking to connect to build more knowledge and friendships. 

She apparently doesn't feel your friendship is important enough to abide by the agreement and wants to take advantage of you.