you definitely should. there's a clear market gap. you can also build a community out of current/former clients and offer that support network as added value to clients. there's also a lot of hucksters out there who does this type of thing, and a good developer type would sniff them out quickly. stay genuine and real, and avoid the "You can build a life of FREEDOM and WEALTH from HOME !!" mumbo jumbo and you will do well.

It's also more scalable than churning out billable hours.