I'm currently rehabbing the property and I'm planning on finishing up the basement to make it a stand alone 1BR rental (Long or Medium term) with separate entrance. 

@Chris John I have a contact with the police, will be securing all entrance points, and placing a Simpli Safe alarm system on the entire home.

There is 1 bed, 1 bath with a separate entrance in the back.

Once the work is complete all entrances get new set of locks so there is no chance of someone getting in.

I just helped some of my house hack clients into some homes around there with split levels and 3 private entrances.

The basement has an outside separate entrance and the 1st and 2nd floors would need to be split.

Covid is temporary and the ski resorts aren't going anywhere, so I figure there is significant long term (winter) demand for Airbnb's near the entrance to BCC and LCC. 

The primary reason for having to install the system was because the property was designed with only one main entrance.  

The house is four levels with one common stairwell, each level having it's own separate entrance.

Complete How To Figure Your Gain or Loss Worksheet .If the business or rental space wasn’t within your living space, such as a first-floor store with residence, an apartment with its own entrance (and kitchen and bath), or a working farm with a farmhouse on the property, continue to Determine whether the business or rental space still counts as a business space , next.Determine whether the business or rental space still counts as a business space.