Then add on a Home Warranty for the big ticket items. 

Once you develop a client base you can market directly to your targets, showcase the experience you are offering and even monetize add on services. 

Add one single partner that is outside the circle or "market" the deal, then yes, it securitizes the investment.

It has an add-on that has vertical paneling.

It'll likely be time consuming w/ lot of dead ends.... because you're trying to make people sell you a house at such a big discount you can add on your fee and still sell it to someone else below market. 

ADU's are not cheap and cost about $50k for an existing structure conversion and $100k+ for add on unit.

Tenant moves out, and you add-on, remodel, triple the square footage, quadruple the house value.Then you put it back on the rental market. 

Any profession that does screening for acceptance and employment in my book is a value add on a tenant application because there is a second set of eyes reviewing that person. 

It's an open source CRM but i don't know of any plugins or add ons that can accomplish this either.

Many of the posts that start by quoting someone simply add on to the quote.