I know this isn't entirely passive, but I occasionally rent my spare room on AirBnB. I'm quite clear that it's a basic room and if they use the kitchen etc. they need to clean up after themselves - this isn't a hotel I'm running... So there's basically no work to do other than cleaning the bedsheets, which I do as part of cleaning my bedsheets anyway... I do this for a maximum of 1week/month, which gets me roughly £4000/year and since it's tax exempt in Scotland (under lodger laws), it's the easiest money I've ever made.
Sounds like it's treating you well but have you had problems or do you price it so you generally price-out those that might less than savory characters?
I live in a city that lacks hotels and doesn't have any tourism, so the only people contacting me are people who work in our local industry (offshore oil production), and just need a place to stay while they are doing training, etc. I've never had any problems, and like I said that has kept work for me really low.
In terms of pricing, I just priced it by what I thought was fair. I do refuse people though, since like I said I wouldn't host for more than a week or so per month (I don't want this turning into a job, but it's the easiest money anyone can make if they have a spare room).
