You could hook up a coin operated power supply box like this one to some regular laundry machines.They cost under $200.https://www.amazon.com/Operated-Electronic-Selector-Acceptor-Shipping/dp/B07WDBLBDD/ref=asc_df_B07WDBLBDD/?

I still would not apply to me...per the definition of "commercial solicitation" in the state code at https://www.scstatehouse.gov/code/t30c002.php(3) "Commercial solicitation" means contact by telephone, mail, or electronic mail for the purpose of selling or marketing a consumer product or service.I am in no way warketing a consumer product...or to consumers for that matter...

Tenants can pay electronically, do maintenance requests electronically.

Electronic locks are incredibly quick and easy to do, although not remote.

I reckon using an electronic door lock would help - that way they won't have a copy of the key and you can still do showings without anyone being present.

I would try and use some alternative electronic method going forward if they allow it. 

Collect rent electronically; 4.

In Canada that is a common way to transfer funds electronically.

They can do a zoom meeting with you to go over the documents (they will have electronic copies and can screenshare) and use something like docusign for your signature. 

I personally like to walk/talk through the lease with the tenant even if it's by phone before sending it electronically for signing.