I can say that with Phoenix, a multitude of opportunities can be in store for you if you invest in their market, network, or even just want to get familiar with it.What type of real estate are you into: fix & flips, buy & hold, multi-family, or something else?

According to the Planning Board, the intent of the RM-2 Zone is to create, maintain, and enhance residential areas characterized by a mix of single family homes, duplexes, townhouses, small multi-unit buildings, and neighborhood businesses where appropriate.I'm assuming by definition I am zoned to convert to a triplex?

As far as benefit to the seller goes, @Matthew Paul I think you are probably right on the money and regardless of whether they would have preferred to stay in this house rather than move, it is likely providing them some excellent cash flow; and I'd be hard-pressed to come up with a deal that serves both parties better than the current situation. 

This will help guide your decision opposed to investing somewhere for a novel reason.for example for me it was cash flow, price to rent ratio, land lord tenant laws and availability of multi-families(Just to name a few). 

In terms of structuring the deal you can do it however you want as long as it is legal, ethical and agreed upon by both parties.

Small multi-family properties starting at over $1M, which is pretty expensive and, resale single family (before year 2000) offer minimal cash flow (~$200-300/month).2.

Is there a video that teaches how to do that somewhere?

You'll likely also reduce your cost of living by moving to a stabilized apartment.Depending on the cashflow and debt paydown, you can use this strategy until you've built enough equity to reinvest.On the other hand, getting into a multi-family after refinancing will also help you build substantial equity to rinse and repeat in the coming years.

And by how many videos stating INTENTION.

I do know some people suggest having multi checking accounts for long rental properties.