Hi, I have a private clinic at home and am an aesthetics practitioner. There is no requirement to have a room of any size, although these people will be paying a great deal of money for something which does not take very long to do, so make it as professional and as clinical as you can. It isn't a spa treatment; it is a medical procedure injecting toxins into a body which has potential to cause death in the event of an adverse reaction. Make sure they are fully insured and check they as registered with the GMC ( my insurance is with Hamilton Fraser and costs £65 per month, in addition to my nursing fees.) There are lots of laws regarding advertising too. In no way, shape or form are you allowed to use the term 'Botox' in or on ANYTHING. "Muscle relaxing treatment injections" is what most of us refer to it as. Anyway. Enjoy!!