So PART of the house is on a block foundation. 

For example, where a duplex or quad can secured with standard residential financing, a medium sized apartment block will require things like environmental assessments, etc... 

As for value add, I have a huge backyard, probably the biggest in the town. and I'm a block away from walmart, and downtown so the location is good.

I came to find out that the house was on a drug infested block, with boarded up abandoned homes next door.He said that the appraisal was off because they used the wrong comps and urged me to get a new appraisal with a different appraiser.

In the long run, newer subdivisions cost the government more than inner city blocks.2) Older businesses that sit on expensive land in city centers pay less tax than newer businesses, forcing newer businesses into greenfield developments even as older areas with good infrastructure become pockmarked with parking lots and abandoned sites.Rent control won't solve them, but a more rational taxation system will. 

Our current residence is a 3/1 1420sqft and is located in a very nice, small town in DE with a very sought after school district 3 blocks from the school.

A two-condo regime can be great, but if you have big trees in the wrong spots, you can get blocked by the city permitting process.

If you do, the same can be true about a house 2 blocks away or 2 miles away.2 - Controlling your who your neighbor is. 

Since you been around the block a few times and plan on making a few more rounds, would you be willing to make a generalization on how you approach homeowners as oppose to investors?

A few blocks away, “Hope + Flower,” another newly completed luxury high-rise is offering up to ten weeks rent free for a 24-month lease.