Mow lawns (agree with OP on riders only)
Flip houses (let my daughter do all the stuff that HG tv ladies do, and I just work on demo day and cut checks to sub contractors rest of the time)
Junior College teacher in business or MIS curriculum, or a HS teaching job in economics/accounting/history/philosophy/sociology related courses.
Crypto coin mining (let my son do all of it and I just cut checks)