I'm not sure how much I would do with a tenant in place, but I'll give you some common scenarios that could cause  these sorts of things:1.

Chat GPT will give you the most common answers. 

What is common in your area for LTR fixed amount or percentage of first month rent?

Seller financing and creative financing is very common among investors right now because of the way most deals pencil out with traditional financing.Honestly can't go wrong with most places along the Wasatch front.

https://www.biggerpockets.com/...12 Frequently Asked Questions (And Answers) About DSCR Loanshttps://www.biggerpockets.com/...8 More Commonly Asked Questions and Answers to DSCR Loanshttps://www.biggerpockets.com/blog/eight-questions-and-answe...What Documents Do You Need for a DSCR Loan?

Navigating tax responsibilities can be complex, and one common area of confusion is whether private lenders should send Forms 1099-INT to investors and if investors should receive Forms 1098.

Overruns are common.

I would own the other 25% of the property as a tenant in common.

I'm not sure if this is a grey area or not but would be sweet if someone could clarify.BTW, it's apparently common knowledge that the buyer's agent commission sells more homes at the 2.5% to 3% mark. 

There is a lot that is just common sense and stuff you should just know.