Van Dweller Requesting to Rent my Parking Space. Advice Requested

[Kendra Mattson]

I'm currently house hacking and have an ad up to fill a room. One of the responses is from someone who lives in their van with his wife.  He says they wouldn't need any hookups or access to the house at all and is willing to pay a few hundred a month for the spot. I asked him about his van to see if it would even fit in the space, but I'm not sure if there's anything else I should be thinking about. I currently have a truck the lives in 1 of 2 spots, so I could easily just start parking on the street. I don't really even see the need for a contract or a background check since they wouldn't have access to the house and it wouldn't change/hurt my situation if they left at the drop of the hat. I guess my only concern is if they just park it there, never move it, then never pay. I'm not sure what recourse I would have for that. I'm in San Diego and the SD parking Enforcement website addresses illegal parking in public areas, and vehicles abandoned on public or private property for 30 days, but if they're living in it for that time I wouldn't think it would be abandoned. Have anyone had this kind of rental before? Any advice would be appreciated.