If you wish to get licensed in every state to act as a lender, go ahead but the cost to do that is extraordinary so you would need to spend money on that and getting proper insurance since you are essentially issuing a mortgage. 

With 5-10% down or an FHA 203k loan, you will still run into the issue of not adding enough equity to do a cash-out.

You need to hook up with an attorney who regularly represents hard money lenders - you need to make sure your loan docs are compliant with state laws and are binding on the borrower. 

Inflation seems to be an almost universal-economic issue at the moment, and premium housing has always been in demand.

I have been in the ringer through real estate investing (negative cash flow, scammers, bad contractor, obtaining more than ARV, getting less than ARV, plumbing issues, positive cash flow) learning head-first the whole way.

Borrowers have to pay their HOA I am not from Florida either but I believe most states allow the HOA to foreclose for non payment of dues most states give HOA's special foreclosure laws that are stronger than a simple lien in order to give the bank 1st priority otherwise an HOA is a document recorded prior to the first and would hold priority if they didn't sign it or legislate that position away.

But even a private contract does have certain issues if it runs afoul of other rules/laws, such as privacy issues surrounding credit ect.

Think Wyoming, Nevada, Texas, or Florida, their laws and taxes tend to be kinder to real estate investors.

I can’t tell you the exact price per sf, but generally, I’d pay about 10-20k for just drywall, carpet, doors etc in an unfinished basement, if you have any minor  foundation issues/leak that’s probably another 5-10k adding a bathroom is probably in the 8-10k range maybe a little more if you have no drain stack in the basement, digging down can easily be 50-100k 

-Consider offering incentives or concessions if offers are not being submitted.Tax Planning:-Understand tax implications and consult with a tax professional.Pre-Sale Inspections:-Conduct inspections to address potential issues beforehand.Remember that every real estate market is unique, and the effectiveness of these strategies may vary.