I am surprised people are being shitty about OP wanting to offer the service from home. I'm not a huge high maintenance beauty person, but lots of the times I have had lashes, brows or nails done it's from the person's home.
The best lash girl I ever went to did it at her parents house - although it was spotless, it was like Mrs Hinch's house and she did it all in a spare room, not the living room.
Try not to let posters get to you OP - lots of posters are just being practical, whereas I had assumed you would have all the hygiene, insurance, qualifications stuff already in place. I do agree that on these types of threads there are a minority of posters who cannot wait to jump in and piss on your parade by implying you are totally unprepared, but that always happens on any kind of new business thread.
In response to your OP - drinks wouldn't make that much difference to me, as others have said, you can't really drink much of you are having your nails done anyway. I think good parking is a bonus, and a clean, spacious house is nice. I wouldn't be bothered about if it were in your living room or a spare room. I would never bring my kids to that sort of appt so that is irrelevant to me, and as others have said, it could be a bit of a hazard and distraction if you have stuff everywhere or are trying to do intricate stuff. For me, the main things are good work and being really friendly.
Good luck x