One time I had a guest smoke and it went right up the ducts into my unit, it was awful.I'm conscious about how that could potentially affect guests who will be staying in the upper unit in the future.

@Kenneth Joseph Perfido It really comes down to math and future goals.

Deflates property values.....interesting future.

We don't have kids (might in the future), my husband and I are young and healthy, have stable high-income full-time jobs, and just put in a lot of work to both properties so don't expect huge expenses in the near future.

4.Tips to avoid similar issues in the future?

Originally from Africa, I’ve embraced new opportunities to build a better future, and real estate is at the core of my financial freedom plan. 

If interested, DM me and I can connect you to the organizers so that you are aware of future meetups.

As a matter of fact, you might be losing future depreciation by accelerating it now. 

However, for future purchases as investments or otherwise, as a Realtor, I never take a commission on my purchases.For one, I don't want to pay taxes on it or split it with my brokerage. 

Having a co-signer doesn't feel like that at first, but you can't predict the future.