1. I often don't value myself enough. With bigger side hustles over the weekend (auto mechanics or not), I aim for $1K a day. I'll take $900/day playing in my own shop doing something fairly routine.
2. This sort of job is kinda fun and I have a 2-post lift and chainfall that make it all a one-man affair. Plus I've done it a few times and have some methods to make it flow. Hell, I even have markings on the floor outlining the balance points of a Tahoe with and without an engine.
3. All that's needed tool-wise are full ratchet and wrench sets, some impact sockets, torque wrenches, protractor, 3-jaw puller, metric ruler, some screwdrivers (mostly as small pry tools), some Torx drivers and a bungee cord.
I'm not saying your quote is high and you're saying my quote is low. I'm agreeing.