You've just barely scratched the surface with your question.

On the surface, there's not enough meat on the bone for you to spend a lot time on this deal if you can get all the payoffs

The Heatizon system I saw went about surface deep into existing concrete and then sealed.

After doing some surface research I really think that there are several good demographics.

Everywhere is hard surface flooring.

The tenant merely soaked up the surface water that he could see and tried to cover up what had happened.

The following language further supports that solo 401k plans are not as simple as they may seem on the surface. 

I'd forget about their "estimates" and do a little research on insurance, landscaping, utilities.On the surface of it, $2100 gross per month for 99.5k seems pretty decent to me, but you have to consider location, age , quality of construction, etc.

Here's the deal, it looks good on the surface, what am I missing?

All the competition was doing all new surfaces and fixtures, interior and exterior?