I've done the same for recently sold similar condition and configured properties to get idea of cash on cash returns in neighborhoods I'm interested in.Mostly between $200-400K.

It's near commercial areas, schools, and restaurants.Now to assess its ARV, we don't have websites like Zillow or MLS to check how much properties in the area have been sold (and whether they're brand new or remodeled).

The website, and county worker, both said that any list or listing by the county cannot be used as a part of a mailing list or as a marketing tool, and that doing so would violate both state and federal law.How then do people come up with tax delinquent lists?

Spend time reading forums and free education here in bigger pockets and you will likely find better info and tools than they will provide.  

All the calculators show closing costs, and I can estimate them based on the way I have purchased and sold in the past, what’s confusing me is how to know what I will be paying in the scenarios I posted above.

These loans are a great tool if you don't have a lot of personal income, or have a high DTI.  

We both have experience in the single family realm having bought and sold several single family houses each on our own using conventional financing.

They don't want to sell at a discount, and they're willing to hold onto it until it can either produce cash flow or sold at retail. 

So you sold for $300 and subsequently bought for $300 (from the QI) and you have completed a successful 1031 exchange. 

@James Clements I sold it on terms.