Other financial discussions

You would qualify for QBI treatment if your rental qualifies as a trade or business. Per this article from the IRS a trade or business is an activity carried on for the production of income from selling goods or performing services:

You are providing a service in that you are actively involved in the maintenance of a rental property that is available for tenants to rent. So, you have a good argument that it would qualify for QBI treatment. It would be different if you were a silent partner in a rental activity where you only had a financial interest in the enterprise.