Being self employed is a hard (but rewarding) job. I was a self employed signwriter for many years & only stopped because business got tough & vinyl stickers took a lot of business away. Yes I could have went into doing vinyl, but it wasn't something I wanted to do. But I know how much hard work is needed for little in the way of money. My other 1/2 has started her own business as a cake maker & when people who usually get their cakes from a normal baker's find out the cost of a cake, they at first can't understand why a single teir cake is @ £100, but when they compare what they get & the level of detail that goes into it, most are happy to go ahead.
There's very little profit for the amount of work & cost of overheads, but the enjoyment is worth more than money.