It's a huge amount of work, but I've met a couple of people who set up their own out of hours "school" and have been running it for years. That said, they lost

It's a huge amount of work, but I've met a couple of people who set up their own out of hours "school" and have been running it for years. That said, they lost money on it and even now it only breaks even in a good year, so it depends whether you're looking for a worthy occupation to fill your time, or something to do.