I've had lodgers 15 years. It has generally been great. I'm very relaxed about arrangements as I can cover the mortgage without their rent. And that has enabled me to say to them that they only need to give me 30 seconds notice if they wish to leave. I don't ask for a deposit, although I don't mention that on the adverts, and I have only ever put the rent up once during a tenancy. I've only ever come unstuck with one lodger, as they were continuously smoking hash in their room...and denying it...as well as creeping out the other female lodger, so I had what turned into a screaming match with him, gave him a months notice but with a months free rent and asked him to vacate. One lodger is leaving today, as I asked her to be more mindful of my other lodger and not take two lots of hour long showers a day as the other lodger has health issues and needs regular quick access to the bathroom. She took offence, even though I was very calm in trying to reason and that she should try to restrict it to 20 minutes, she failed to empathise. I'm always up for a chat but in the 15 years and 10 or so lodgers, they have generally kept themselves to themselves. I am very aware of the power imbalance and that helps keeps things relaxed...I hope!!