You should own their commercial rental property in a limited liability company to protect your other assets and savings from claims and liability for the actions or omissions of tenants, contractors and others. All sophisticated and well-advised owners of real estate do.
We practice what we preach. All of my family's apartment buildings are owned by limited partnerships and limited liability companies. My law practice is a limited liability partnership. Before I had partners, the lawyers I employed all worked for my professional corporation.
Putting your rental property in a limited liability company is easy, fast, inexpensive, and provides a lot of protection.