Just a comment on the tools. We have a great big shop, filled with Mastercraft, powerfist and propoint hand tools. Don't be afraid of them. If they have a lifetime warranty, they are easier to replace than Snapon. Save those dollars and put them into higher quality power and air tools.
We use Chicago Pneumatic air impacts. 2nd to none in my opinion. Jet stuff is great also. I like their impact sockets, etc. Makita grinders. They are the easiest to get parts for. Not throw away tools. Lincoln mig welder, Hypertherm plasma cutter is second to none.
We use Dewalt battery power tools. Brushless drills and impacts have been great. 20V Li-ion batteries suck though. I talked to "the battery man" and he says no system is any better for batteries, except maybe Makita. It's all to do with cheap circuit boards in batteries.