I rate a suspension lift kit install as a "3" on a scale of 1 to 5, with 1 being easy and 5 the hardest. I've done several on Broncos just in the past couple of years, most with the help of one to four other folks. Normal time to do it all has been about 10-12 hours. You can do it if you have a few tools and a place to do the work. Some have been done in the parking lot or driveway, as long as that's allowed. You don't need air-powered tools, but it makes the job go faster if you do. You do need at least one good jack, some jack stands, wrenches, drill and drill bits, and plenty of PB Blaster or penetrating oil. Your biggest battle will be removing the stock suspension parts that have 10-more years of rust plus factory-applied Loctite on some bolts. JSM84