A few thoughts on the expense side (usually where the problems lie):I do not have firsthand knowledge of the Tampa Heights neighborhood but the reported taxes seem to be below what I would expect to see in Hillsborough County Florida (about $400/month). 

That height is a bit odd for the entire house.

When I bought in Chicago heights at the end of 2017, the lender didn't provide the taxes without the homestead credit (I'm OOS) and that hurt cashflow but then the taxes went up the next year and I'm paying almost 8k on a house I bought for 93k.If the loophole you suggest exists, just for the homestead credit, that's amazing.

They can be great for cash-flow but also difficult to lease if they aren't what the market is looking for - ceiling height, access to highways, population, etc. 

And what are your clear ceiling heights?

Some of the building is shop space that runs the full height of the building.

Key items to analyze are utility sizes, parking, door height/width and ceiling heights.  

Height of the market, cringe.

There is a couple of streets in Glenn Heights that are lined with 1980's / 1990's duplexes but none of them are for sale yet. 

Coin Laundry, Snow Removal (if your streets are not dedicated back to the county), Lawn Mowing (technically each is responsible for their own lot, but you end up with several heights of grass and random lawnmowers strewn about)