The rent from the other 2 units and 2 parking spots cover all the expenses (except any surprise repairs etc).

Pick a spot and see what happens. 

@Bill B. for context, the home is in a dedicated STR community, so it's safe to say there's a 0% chance of running into troubles like you mentioned in Oahu or Las Vegas.Also, like I said, those numbers are 100% made up on the spot.

I'm not even sure if such a sweet place exists.

It SEEMS fairly straight forward and I'm assuming the easiest spot would be where an egress window already exists. 

@Andy Mirza is spot on. 

I also have a soft spot in my heart for Dallas as I spent a lot of that time in that city in college.

We do a thorough job looking at comparable units to price our vacancies, but will decrease the price $100/week until we see a sweet spot with inquiries.

In that area you should get about $500 month per spot, hopefully 2 per 1/2 ace lot. 

Unfortunately, it's not always possible to tell what's being covered up--which is one reason I rarely buy newly rehabbed properties, and I especially don't buy properties with newly finished basements (if the basement is unfinished, you can see a lot more of the plumbing, wiring, and you can also spot signs of settling or other structural integrity problems...but, if the basement is finished, you can't tell what's underneath the new finishings)  ...in fact, I'd say the basement/crawlspace is one of the areas I inspect the most thoroughly, because you can gain so much knowledge about the condition of the property by carefully looking around down there...Good luck out there!