Instead, I would suggest seeing if you can find a 'caretaker' / renter who wants a parking & garden space for their self-contained tiny home on wheels, trailer or rv.  

I'd suggest to try to narrow down the region you're interested in, the type of STR you want to have (there's so many variations, it can be condos, homes, cabins, tiny homes, glamping, houseboats, RVs, etc., they can be specialized for medical professionals, business travelers, large groups, etc.)

Personal credit will be a factor when applying for sure, however you should be able to find a loan product that is non reporting and will not affect your personal credit going forward

But again, it's going to depend on factors specific to your situation.

You would also need to weigh the risk factor for each investment.

If the market tanks (rents are currently in depression while prices remain at all time highs in my areas) it would be for different factors, at least in my opinion.

Not sure the type of return you are expecting but with the purchase price and units provided definitely make sure you account for all factors prior to moving forward if you choose to.

This is not your best option as then each unit is tied together and an exit strat becomes more time consuming and difficult to do because your lender is now the deciding factor in splitting the loan apart if you choose to sell. 

@Lisa Beard In order to factor this into the deal, you would include a line item for property management in your deal analysis / underwriting.

There are other factors at play than just the cash flow!