That shaving gel, in my experience, is okay, but nothing special. The only one I ever found to be especially effective compared to others was Gilette Fusion... but it's not worth it, considering the price. Try hair conditioner for shaving. It's relatively cheap and it does the job surprisingly well.
I pay laser 35 $ per 15 minutes, and a full face can hardly take over 30 minutes. Although now that I'm almost done with laser, it's done within 15 minutes. Depending on various factors including how good a candidate you are, you should be done within 6 to 12 sessions. 6 is pretty early to be completely done, and 12 is kinda long, even though I've heard of things like 15-18 sessions.
So anyway, let's say half your sessions take 15 minutes, and half take 30 minutes... if you go to the clinic I go to, it should amount to about 315 to 630 $. Yes, it can get pretty cheap if you choose your clinic well. The first one I went to and sadly signed for 7 treatments with cost me 2600 $... including a discount of 40 %. Which puts their rate at 124 $ per 15 minutes, after discount. So shop well. (Oh yeah, and in case you're wondering, they're all certified professionals, and they're all using a LightSheer machine.)