I do have one question - I have a partner and we are looking into getting a properly together.

With a backup plan, and proper (extensive) legal docs, much of the risk can be mitigated.

Most inspectors will know that properties only need to meet whatever the code was when they were built, not current code and they usually explain that properly IME.

You might find that installing a mini-split system, properly insulating, and ensuring the finishes match the main home’s quality will make a difference in how the appraiser views it.

As @Patrick Drury mentioned- the West Side does not have any POS areas (besides Lakewood, but it's only needed for previously non-owner occupied/rental properties) Something else to consider in Cleveland proper is Lead Safe Testing ..

Investing in real estate means your money is backed by tangible property....assuming you do it properly.

Now if it was definitely a single unit and only she could do it and it was properly labled it would be on her.

So you can really get an idea for the market and if a property you are looking at is properly priced!

A lot of tenants might not know how to use it properly. 

If you like the property and have that amazing rate, just heloc out enough equity for the down payment on your next purchase and start hunting for deals.