School on Saturdays? That's scary.
Anyway, I don't see - at all - how an electrolysis clinic would be more open on Sundays than a laser one. You know, with laser, too, if you can't on the sixth week, you can take an appointment on the seventh, or eight, or basically any Sunday. Waiting longer doesn't hurt any more than the fact you make the final results late by one week.
Also, with the enormously higher amount of money you'll spend on electrolysis, I'd tend to think you'll be working no reason 1/4~1/2 the time. You could almost get a lot less hours and have the same amount of money in the end. I know jobs don't work in such a way that you can just say "give me less hours", but still.
In the end, it's still your choice, but I fail to see the logic behind it. I really, really think that you should do laser. As I said, you can go and do laser "on a Sunday when you don't have errands", too, just like electrolysis. And whilst not all laser clinics are open on Sundays, the very same goes for electrolysis ones, I'd say...
I won't harrass you any more, but I just wanted you to put more thought in the possibility of doing laser. I'm sure it's possible even for such a dreadful schedule as yours.