Most people I know who take on side projects do them because they enjoy solving problems. They find them enjoyable, and to many, side projects are like taking a vacation. I wouldn't pay someone to take a vacation for me, that's nonsensical and defeats the purpose of the vacation.
Why would you pay someone to do something you enjoy doing, so you don't have to do (any/some/all) of it? What kind of side projects are we talking about here?
Why would you pay someone to do something you enjoy doing, so you don't have to do (any/some/all) of it? What kind of side projects are we talking about here?