I was in escrow for a few days and the seller side couldn't give me access to see all 4 units.

The only improvement I would consider add-on is recessed lights...

If the "air conditioner" you referred to in your post is a window unit that would fall out when you turned the house upside down, then it is 5-year personal property; otherwise, 27.5-year propertyLandscaping and ground improvements are 15 year property that would include driveway and sidewalks.For a single family rental, a cost segregation study is most likely more expensive than your tax savings could ever recover through accelerated depreciation. 

@Brian PulaskiI have the correct tradesmans but, it is difficult to understand the scope of work without gaining access to the inside of the property until the current residents are out.As long as major work is not needed then I expect to be done within the 60 days. 

It seems like there's a lot of exciting businesses in the pipe and access to Wayne Junction makes it a very attractive area.

I have a friend that has access to the MLS.

I can't believe that there will be equity in it as far as what I've paid on the principle, so is the idea that I'd make improvements to the place throughout that year with the rent (even though I think I should do it before I rent it out, right?)

If you improve the property by investing, for example $20 per square foot, what would those improvements bring you in increased rents?

Your agent may be able to access them. 

You can almost always improve your situation with a house hack of even a duplex.