No idea how long it takes but, If you are going to do anything from home then you need serious marketing budget to let people know you are there. Probably need something in planning permission to operate a business from a domestic property, also some plumbing/building work to put a sink and the appropriate lighting in. Also you'd need indemnity insurance. And all the equipment. Might be better off retraining then work from a hotel spa/existing beauty salon?
(and after a recent thread on here,, would you be using antiseptic wipes inside vaginas??? )