Steve,
I guess I am Lucky. I ordered my kit on Tuesday April 8, and FedEx delivered it the following Sunday!
I did install the kit myself using basic hand tools. It took about a day and a half. The instructions, while complete, are written for someone who does this type of work for a living, in my opinion. The front is the hardest, and I tackled it first. It is not necessary to remove any of the wheels, although you do get into some tight spaces. I am 64 years old and about 6' tall and 190 Lbs. Too much larger and I might have had some issues. Good jack stands are a must. For the most part, I used the leveling jacks in addition to jack stands; however, the ping tank mounting required me to raise the front jack and rely on the jack stands. I did have some self induced problems that probably cost me 1/2 of a day on the install. All due to the routing of the air lines to include the ping tank.
Please be aware, some RR4's had two leveling valves on the front rather than one, mine included. This is where my self induced issue happened.
If you are reasonably mechanically inclined, this is a job you can do. My only expense was buy a heavy duty air impact wrench to replace a worn out one. A small price compared to the $3,000 I was quoted for a kit install. This kit vastly improved the ride and handling of my coach.
Good luck on yours, it is worth the price.