I may have to get a variance for the existing dwelling unit's parking requirement, but I believe I meet all the SB-9 requirements.

I'd tell them to return it and buy one that uses the existing connection.

He's seen me grow to four units (3 properties) and I'm thinking, there's gotta be a guide or book that would help him just follow step-by-step how to rent out his existing property and buy a new one.

It looks like you can use a 203k loan for new construction to reconstruct on an existing foundation.

So, if you put in 20K, you could set the bid up to the amount of the 100K total debt(80K existing + 20K additional) to ensure that the property reverts to you as the lender.

I know I can easily find a qualifying tenant who will pay $1,000 per month if I don't renew a lease with the existing tenant. 

Requires some pre-planning if the ceiling height exists. 

It will co-exist with other "new" payment methods such as google pay, apple pay and credit card etc, because the target customers are different.

@Peter Mckernan Love the way you did that deal and agree that those deals exist both on market and off market you just have to be able to look for them in an effective way and add creativity. 

Usually you're going to have to invest some front-end money to survey it out and work with an engineer to figure out what's possible (generally the more lots the better) based on your existing access to infrastructure, the desirability of the area, zoning rules, etc.