What is your definition of flex space?

In Franklinton there are plenty of large projects going on that will bring massive growth to the west side of Columbus, such as the Peninsula Development, which is a multiphase project that will erect a 24 story apartment complex featuring a grocery store, a multi use office space building, and a new hotel featuring a two-story Pins Mechanical venue.

Lenders in the RE space aren't the healthiest right now in my opinion and need some stable wins on their balance sheets.

The waterfall on either side makes the space kids friendly (no abrupt sharp edges).

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For reference I would have only been able to rent the space for about $900/month.

I am not a pro in that space so I may be wrong but that is not what I am seeing. 

This is a Maryland Historical Property, zoned for residential high density, with specific limitations on its usage due to its zoning.The property is massive, offering 8,276 square ft of space, including 5,445 square ft of finished area, and it features a substantial driveway.

While it’s true that ADUs might reduce yard space or parking, the additional income stream easily offsets these downsides.6.

If this isn't a separate dwelling unit you can't take losses from the rooms / space you are renting and use them to offset non-passive income (Section 280A of the tax code)Rental expenses are limited to the amount of your rental income and the balance of rental expenses is carried forward.