A quick internet search suggests that foreign national loans can provide up to 75% LTV.

Orangeburg is an inferior, out of date product, made out of essentially paper and tar.

My partner and I bought a home in South Florida end of 2021 with the intent of doing a small Reno and then airbnb/vrbo and then blocking out the dates we wanted to use the property.  

If a tenant is breaking clauses in your lease at minimum I would have stated that in the letter, given ___ days to make the correction, or plan to move out of my property at ___ date.

Look at the date of preapproval (over 60 days old is a warning sign but not a big deal)2.

If for some reason they can't get this sorted out by the next payment date, you should figure out how to physically escrow that payment somewhere...this at least protects your payment until you're confident who it is supposed to go to in the future. 

Run a credit check, which will include her address history and the dates she lived at each one. 

Then plan a date to actively start looking to buy.

Was there a date by which the inspection had to be done by (normally within 2 weeks)? 

Look at properties with lots of reviews and lots of available dates to rent.