Check with your insurance agent about your exposure, that might be a better tool than depending on local law.  

Typically, when I work with RE investors, we'd make a preliminary legal plan to ensure that both the legal and business goals align before creating any sort of entity set-up.

They typically involve two agreements: a lease agreement that outlines the terms of the lease (rent, responsibilities, etc.) and an option agreement that grants the tenant the right (but not the obligation) to purchase the property within a specified period at a predetermined price.Negotiation Power: Lease options can be attractive to tenants who may want to secure a property for their business while potentially benefiting from any appreciation in property value.

But LLCs and banking accounts is mostly your personal preference of how you would like to organize your business structure.

These websites often include project proposals, public notices, and contact information for city planners.Local Newspapers and Publications: Stay updated with local newspapers, magazines, and community newsletters.

You are looking to rent or buy a space with a partner to have a personal fitness business or just a class?

Definitely attend local meetups.

Property tax is levied by the local municipality and needs to paid by the owner, regardless of where they live.

So look into your local and state laws to determine what laws you need to follow. 

A great way to network and meet people in your local community is to attend in person meet ups.