I actually am happy I asked Beate to comment here, because I apparently had it all wrong, or at least the details thereof anyway
DIY is always rewarding. Regarding treating others however I feel I can offer up some advice here.Having made the transition from DIY'er to "not so DIY'er" I'm in a position to point out some of the challenges it can present.
I want you to pay particular attention to what Beate said about regulations on how we sterilize our equipment.I face similar regulations here in Canada. There is no regulation on doing electrolysis but the tweezers we use must be sterile ( as do need to be our probes and equippment). Often places will put restrictions on who can operate an autoclave and what must be done to test it regularly. Here in Ontario Canada for example in order to run a heat sterilizer or autoclave and sterilize instruments with it, one must perform a series of "spore tests" to prove it is working as designed. The records of such tests being performed by an accredited laboratory must be kept onsite and it must be repeated biweekly. Chemical strips are insufficient. These kinds of regulations must be paid attention to when one goes from DIY'er to working on others. Spore tests can get expensive, a couple hundred dollars a year easily plus shipping costs to send the spore tests.
Of particular concern should be ergonomics. A proper treatment bench you can get your feet underneath is crucial, you cannot be leaning over to see your client. You will kill your back. As is proper seating for yourself ( usually a saddle stool) and height adjustability of both to get the right positioning is critical. As part and parcel of ergonomics is your magnification and lighting. Lighting you can control the direction of and in many cases, magnification can mean expensive optical loops or medical microscopes. Getting the client in the ideal position so you can see and work on them comfortably is fairly critical.
Good luck on your journey!