Have you ever spray basted before? If you haven't you will need to keep in mind that there is overspray that will get on your wall & floor. You will also be breathing in some of it.
I used to spray baste on my living room floor, using newspaper to reduce the overspray. It helped but didn't stop it. I stopped the spray basting when we got new carpet.
I also wore a painter's mask but it got hot when I was working on those big king size quilts.
Good luck with your project! I hope it will turn out exactly like you have in mind!