My concern is that there are no garages in any houses in my neighborhood.

It is a 5 bed 3 bath, 3100 sq ft home on nearly 1 acre, 1/4 unfinished basement 3/4 crawl, 2 car attached garage.

I'd recommend investing in two or more doors in a decent neighborhood for the long-term.

We remodeled before we started renting, new paint, doors, refinished hardwoodsWhat was the outcome?

If interest goes up, then investors need to pay less per door to make it up. 

Also, there is a detached garage that is completely run down and unused.

For those that may not know, the fenestration business is simply know as the window/door market.

For what it’s worth - my 0.02 is to do a lot of networking - ask people what they do or have done, find mentors and partners, and start that way.

Knocking on doors I assume and asking residence?

I think you can find a house with a garage apartment in several parts of the city, but i wouldnt say thats a true multi familyfor better cap rates on SFR look to places like missouri city stafford for homes that will have a retail end userfor flips and flood risk properties look more at  northwest houston north of i10best of luck