These homes range from 3000sf to 3600sf and each have finished walkout daylight basements and these sold homes have recently and consistently sold at $220/sf.

All comps in area are similar to $500k range.

I think I might have a few people in that post-bidding price range, I'll let their Realtors know if it comes up" is broadly accepted as normal activity (I'm not commenting on what SHOULD be, merely on what IS) unless some sort of confidentiality is specifically requested. 

Single family houses range anywhere from $50,000 to $100,000 but mainly under $75,000.  

Is it true that SBA loans can get down into the 4% range?

Any agent can set you up to receive automated listings in your preferred area, price range, etc.

To be precise, properties I am purchasing with my turnkey provider are slightly more expensive (120-150K range, higher rents) and appraisals came in lower by 5-10K.

And do you guys recommend one doing your first deal; also what is the price range typically for one ?

The CT market allows you to do a lot of things because of how diverse it is.

If so, I'd underwrite it with a range of interest rates and see where the deal breaks.