There is an alternative option that's one of the rare times an S corp may be recommended for holding a rental and this is it.

The alternative is to create and execute your own marketing campaigns, but I truly don't recommend this option!

And as @Tracy Streich has stated, forming a real estate company can have significant unexpected costs that can include insurance for the business, payroll taxes if there are employees, attorneys fees for forming a partnership agreement, accounting fees, and so on.Perhaps an alternative may be to pool your properties and shop for a good property management company who will take care of all of you.

The seller is distressed, and won’t have the money for repairs so I’m looking for alternative financing in case I can’t work something out.

If she's this informed why not put it back on her to provide an alternative solution?

The storage rooms are attached to the unit and house the water heater (with a little additional storage).Please share any thoughts on this treatment plan and pricing...and any pest control companies in Greenville or Anderson South Carolina that you would recommend for a 2nd quote.

There are a few websites like upcounsel and alternative legal service providers.

Alternatively, we could just rent 2 separate units in the SFR. 

Liabilities: massive differed capital cost as sludge accumulates in lagoon and then must be removed every 20 or 30 years, potential groundwater contamination from partially treated wastewater leaking out bottom of lagoon, huge amount of land required for lagoons (1 to 3 acres for 50 space park), inability of lagoons to remove nutrients (nitrates under new regulations), irradict / poor treatment during winter.

With that said, have you thought about cheaper alternatives such as laminate countertops?