Hi, it could but....................................there are hundreds of part time turners out there that would all love to try.
If you believe you have enbough guaranteed work to keep you busy from 8am to 5pm Mon to Saturday and you have developed the skill and speed over many years then maybe. Work out how much you need an hour, your overheads including expendable items ~ tools, abrasive, oils etc, electricity, heat etc etc etc and dont forget the money you need to put aside to pay your tax and insurance!.
There is a unfortunately a great difference between turning a few mushrooms and apples like all woodturners do at the beginning and proudly give them to all their relatives at Christmas. They may all say how good they are but realistically and after moving on to something a bit more advanced than such basic turning try selling your pieces in sufficient quantity to cover the above, make a profit and put food on the table you will probably find the answer to your question.
If you are still convinced that your work is good enough to support you and yours join a local AWGB woodturning club and talk to a few of the professionals and they will also help guide you. Apologies if that is a bit abrupt but better you face up to the facts now rather than later, anyway good luck and your welcome to PM me if you have any questions ~ I need to get back to the workshop !!!.