I own both commercial and residential property. I have used the company I mentioned, but I'm not trying to advertise for them, I just know other examples exist.

I didn't install a reader, I provided a physical key copy. Readers make it slicker.

I haven't had any problems, most of my rentals have been for small events. They brought their own supplies, minus a few tables I provided.

Generally people renting space have no incentive to create a problem. They pay, I get paid, they want to take some pictures or get some people together.