Now I’m sure this one has been done – maybe not successfully. An executive assistant service. For a monthly fee, you would be a part time assistant for wannabe executives at small companies who can’t afford one full time. Their calls would be forwarded to your home office, and you would arrange travel, type letters, etc.
This model is big business for network consultants, and I do the same thing with technical writing and it works pretty well. They’re under contract, so they pay me every month even when I do very little work for them.