I own a home (remote, long story). I hope my property manager monitors my realestate in this fashion. Legally, I'm on the hook for all sorts of eventualities and insurance related to the property (eg. fire and perhaps even injury). I'm not willing to foot the extra risk (or bills!) of having a tenant inviting itinerant AirBnB visitors -- that's why subleasing is not permitted by my contract with the leasee.
Would I be happy with an alternative that yields higher net returns than a property manager? Absolutely. Do I want it done on my property against my permission? Hell no.
Great idea btw :)