We have enough room for our hobbies and pets, gardens, and is only 20 minutes from Liberty Mountain (possible short-term rental opportunity, but we also ski so passive bonus).

The middle unit I was planning on a long term lease but I think it may be better to just airbnb it as well and then the garden unit will just remain as a long term rental. 

I pressure washed off the black moss on the brick in the back of the house and back patio along with all other concrete surfaces which made it look new.

A court of six fourplexes, now owned by four different people, or a sterile corporate garden apartment complex? 

rezoning is not feasible, it's very costly. if it's zoning a 2 unit then you are in a so called pre-existing non-conforming, check the floor area ratio if you are already over then there is not much you can do, however if you your FAR is below then there are potential opportunities for the garden unit considering the newly passed ordinance. 

Look at Things To Do in Columbus and there are a few gardens and museums.

@Jacob Moss No.

New stall shower install with garden tub replacement or retile (open to ideas at this point). 

I currently own two one beds, located in Carroll Gardens and Park Slope, I also own a 3 bed in South Slope that I live in.In regards to the four neighborhoods you mentioned and how they will potentially appreciate, I would say the following:PLG- I wouldn't buy a one bed unit here, as it primarily attracts families looking for relatively affordable singe family town houses, and doesn't offer much that young professionals would be attracted to.Prospect Heights- A great area full of dinning options, transportation, bars, etc. 

The previous owner had turned it into a raised bed vegetable garden by jacking up the bottom and filling the pool.