But if you own the property personally, not through an LLC, then all of your personal assets are at risk should you get sued for something that happens on the property (i.e. a stray dog bites someone, or sometime trips and injures themself). 

Wouldn't not being in an LLC leave you subject to a law suit if a worker got injured at your site during renovation or would the insurance usually take care of that?

This guy is shady and if he doesn't lose his license, he will continue to injure other parties as well. 

Renters insurance covers the renters personal property, liability (they have a guest over that injures themselves on the property, etc.

I now find going up and down the stairs is not as easy on my injured knee.

If the animal bites someone, the injured party may sue the Tenant and the Landlord.

Let's also assume the room is always genuinely locked and I'll have a reasonable way to argue this, e.g. something beyond "it should have been locked".My thoughts:1) It's a locked door, literally no one will know there's a gym on the other side2) Worst case is that someone broke in, worked out or claimed to work out, and filed a lawsuit saying they used the home gym and injured themselfIf I have evidence the person broke into the room (e.g. video from the inside of them breaking the door/lock), would I still be realistically liable?

I realized worst thing can happen (people can get injured from fire or crime) this was a problem deal with and may delay my investment objectives, but in the grand scheme of thing was not that big of deal

Fire Department shows up picks them up and if not injured people usually stay home.Hypothetically if I were to write down the address and later reach out to them via door knock, direct mail or call are there any legal issues I might run into?

Fire Department shows up picks them up and if not injured people usually stay home.Hypothetically if I were to write down the address and later reach out to them via door knock, direct mail or call are there any legal issues I might run into?