Figuring out the true cost will heavily depend on the type of dig down, depth, and total square footage. 

You have fixed cost so it is better to get some bodies in there so you can get market rent later. 

Long term $ can range from 6's-10% range depending on all types of factors - LTV, location, unit count, debt coverage, borrower strength, full doc or lite doc programs, etc..

It will depend on the the circumstances, the loan type, and the entity type.

There was a member on here a decade ago that focused on these type of deals...K.

What type of properties are you most interested in, SF, 2-4 MF, or 5+ MF?

Funding for mobile homes and abandoned parks can be tricky, but there are definitely lenders out there who specialize in these types of properties.

Upon further review, there is 1 active Type 2 STR permit on this blockface prior to your STR application submittal, but a system glitch did not capture it on the OneStopMap.

I'm a pretty handy guy but this would be outside of my realm, but my experience helps me understand how much this type of improvement should cost.Improvements: remodel kitchen and bathroom, paint interior, fix exterior scafolding.How should I go about finding a contractor?

LTV would be determined by the type of loan.