We are mid-demo right now. We are doing all demo ourselves: removed old hardwood flooring, carpet/pad and tack strips, baseboards removed so new hardwood can be installed by pro, removed old kitchen cabinets/counters. We are also going to assemble and install our new Barker Cabinets. We've never done it before, but feel comfortable doing it.

Things we are leaving to the pros: hardwood install, gas line to new gas range, electrical, and painting (our ceilings are 13 ft. over an open 2-story staircase and it would take us forever, not to mention fear of falling).

I would suggest using all the connections you can to obtain a doable price. We saved ALOT hiring a friend that works for a company that did the gas line, saved 25% on the electrical thru an electrician we know, and thru connections at work, hired a painter that does excellent work for much less than any bid for paint I've ever gotten. Never hurts to ask around.

Assess what your abilities are, and your budget and timeframe. We are finding that the time we have to do demo is ticking away very quickly.

We've done everything on your list and feel comfortable with it all. Research methods online and watch youtube videos, and if you are patient enough to be nitpicky about getting things straight, etc. you could do it all.

Further breakdown:

Demo is something anyone can do. Keep in mind that you could likely give your carpet away on freecycle and make the recipient remove it. We did that on a whole house-worth of carpet. Habitat Restore is rumored to remove cabinets in return for keeping them (would depend on resalability).

Framing a wall is pretty simple. Just make sure it's plumb and square to the adjoining walls. Hanging drywall is easy. I can't stand finishing (hate the dust) and would hire that out.

If you have reasonable skills and patience, then installing floors, cabinets and backsplash are well within range of a DIY-er.

Electrical work isn't rocket science. Running new wire through a vaulted ceiling might be a pain, so you might want to hire an electrician for that if you don't have a lot of electrical experience. If you're just replacing a fixture with a ceiling fan, without running new wire, that's pretty simple.

Done all of that and much more. It's often slow going while learning to do something new, and sometimes you have to tear it out and try again if it doesn't work out. The experience makes future projects easier, if that's any consolation. You need to pay attention to what's allowed in your jurisdiction, where I live now a homeowner can't pull permits or legally do plumbing or electrical work of any kind, but any carpentry is fine. Be sure you know what requires a permit and become good friends with your inspector-- it pays off. Don't skimp on materials or tools and you'll have an easier time.

A Sawzall can be a great stress reliever after a long day at work.