Another job question

I own my own shop and work on cars all day Well, not all day yet. We are just getting started so me and my husband still work our regular jobs, and open our shop from 4:00 til whenever, and Sat and Sun. It's hard, but we want to be sure we can make it before we jump into that first. It's a lot harder than you think to open a fully operational small business. We have a shop with 2 bays, a lift, a nice showroom, a dyno, and a guy who builds custom rollcages and metal fabrications next to us. We are really busy all the time, so I'll soon quit my other job and just tear into motors and trannys all day. My other job is boring. I work for an engineering company. They do every road around here, lots of state projects, all the casinos, things like that. I'm in charge of the big blueprint copies, and the specs that go with em. In other words, I sit here on the computer, think about cars, and get paid for it.