bought a huge hotel, hated being a hotelier so turned it into flats, sold a couple to shut the bank up and kept the rest. My only issue is I live in the 4 bed maisonette, which is bigger than most peeps houses!! So now I want to downsize and getting rid of it is a beggar in the current market as there isnt anything to move to and too few buyers out there! The ones I rent out have had the best and worst tenants over the years, you just learn to vet them better over time. In all its one way of getting a pension but it isnt the be all and end all, its not money for nothing either, you have to keep it good if you want tenants to look after them.
Also being a plumber you see how some landlords work and there are scum landlords out there and they dont get the best tenants either, the good landlords spend their money on ensuring they get the best tenants, there is no way of doing it on the cheap.