Real Estate Professional Status

I own and manage a short term rental. Stays are less than 7 days. I spend over 100 hours/year on it and have no other income. I’m also buying my husband’s office building and plan to manage that (only his business in the building). We also own several long term rentals that are managed by a property management company.

I’m wondering if I qualify as a real estate professional? If not, what can I do to change my work so that I can save on taxes?