If I did this with all of them I could double or triple my current portfolio value.

Even the one you call a walk, is really a double or triple in the overall investment market.

A long term version of this approach is a "Long term triple net lease", also known as NNN, minimum term of 30 years, with option to buy.

The good news: my wife insisted on a triple deposit ($4k) which more than covered the repairs and eviction costs. 

My mother tripled her money on the second house.

triple, quadruple check your arv. most people get burnt on that par, along with refi % and reno budgets. 

., which would be prohibitively expensive to purchase independently3) cloud-based, virtual reality campus that offers ~30 hours of training per week4) Lucrative revenue sharing plan that offers a realistic exit plan from the business within 3-5 years.We nearly tripled our agent count last year, and are creating wealth and passive income for our agents that's unprecedented in the industry.  

@Vikas Ahuja,  this is Massachusetts we are dealing with, and a minor mistake in procedure can cost you months of lost time and triple damages if you end up in court. 

Houses prices have doubled, tripled, quadrupled in a matter of a few years in places like Los Angeles, San Diego, Dallas, Fort Worth, Houston.

Thank you very much for all your feedback.As I understand existing service is atmost of 100a(top two apartments) if I decide to upgrade to 200a ( from 60a) in the ground floor am I required to upgrade other units to 200a as well( from 100a) and would that triple my costs?