I use a double edge safety razor when I actually shave. I get about 3 shaves out of it before it needs to be changed. I've found I get fewer ingrown hairs with the single blade than if I were to use all those fancy ones. There are lots of videos you can watch online of guys shaving - look for razor product reviews and you'll find plenty that can show you technique.
I don't use a lot of water. I fill the sink up about half way (and my bathroom sink is pitifully small so it's *maybe* 20oz of water), wet my face, exfoliate, wet my face again, wet a washcloth and set it aside, brush my teeth, apply shaving cream, and shave 2x (one with the grain, one across the grain). After one swipe with each side of the razor, I dip it in the water and clear it off. I wipe my face down with the wet washcloth in between and after. Afterwards, I use an aftershave and wipe my hands off. This is all using the same original 20oz of water. It really doesn't take a lot. The leg is just a larger area to cover, so it's best done in a tub.
To really clean my razor I loosen the clasp that holds the blade in place, swish it back and forth in the water a few times, and then re-tighten. No more hair. Every other shave, I also clean it with hydrogen peroxide because the shaving cream will develop a kind of film on there.
I'm at a point now where I don't shave anymore, I just trim. And I just use ordinary hair clippers for that. Nothing fancy.