It seems like a hard money lender typically a private individual or venture firm) would be the only route to go since they are a little more lax on lending requirements than a conventional lender.

The interest rate and cost is higher than conventional loans but the requirements are less and the closing process is faster. 

I’ve heard from some lenders that I need more equity, others said there was a “cooling period” required after purchase to be able to use additional gained equity in land (from rezoning), and others needed prior experience.

Basically financing of 10% is always assumed in our calculations/expenses and if I'm the one who puts up the money I make that 10%.       

When I self-managed C Class properties, I would put the requirements for tenancy in the rental listing (3x rent in income, 1-month security deposit, criminal check, etc.), and then when the potential tenants called in, I would speak to them for a few minutes, explain the requirements, get some sort of verbal confirmation on some or all of the requirements, and then invite them to different showing times I had set up.

If it's HOA/Condo vehicle requirements you're worried about, it's usually already in a standard lease that they follow those; otherwise, they'd probably expect tenant to comply with city codes unless there's a viable reason an owner wants something more strict. 

The ADA says true service animals do not require registration, nor can I ask to see it even if they do have it.

The basic math they used to describe "replacing" your income was a bit shocking.

Other easy ways to exceed expectations might include microwave hoods, dishwashers, adding a shed, including basic mini-blinds, etc.

So the lease will be higher than the advertised rent, they will be responsible for minor repairs, they are responsible for obtaining the proper licenses and pay all the taxes for their business operation (If you don't do this, you will regret it one day you see a tax bill that you as the property owner who are responsible for), and they required to have a STR insurance policy.