Not overpaying and getting great terms 3. multiple bids/ quotes 4. project management. 

If there is a property manager, your success rate is going to be very low.   

Louis, MO real estate, ABODEbucks is a full-service STR-specific management company charging a flat $250/mo + $20/night booked.

A good deal for a retail buyer is something they can pay for which has most of the amenities and location they want.

You know just as well as I do that the entry level SFH turn key model is nothing but a money grab for the turn key providers and PM's who ultimately manage the properties for them.

However, the tax treatment differs between short-term and long-term rentals:Short-Term Rentals (STRs): If you materially participate (work 100+ hours and more than anyone else on the property), you may be able to offset rental deductions against W-2 or other active income, offering greater tax benefits.Long-Term Rentals (LTRs): If your AGI exceeds $100K, your rental losses may be limited, unless you qualify as a Real Estate Professional (REPS).If you plan to expand your rental portfolio, consider an LLC later for liability protection and easier management.

( Regarding interior, and not HOA, management, location)Anyone has experience renting for snowbirds?

For owner managed properties like this we see expense ratios in the 35%+ range. 

HELOCs on rentals are rare, and depends on where you are located.

Location, location, location.