My motorhome came with a space tire, in the largest compartment in the RV.
I ended up moving the spare tire to a rack my buddy installed under the RV in the back, taken from a junkyard pickup truck. Make sure to get the device to lower the tire from it's rack from the same truck. IN my case, we ended up making a 6' long rod to remove the tire from the rack, because the rack is mounted about 5.5' in front of the rear bumper. Now I can use all of my storage compartments.
For a jack, $18 can buy a 5 ton (10,000 pound) capacity jack from Harbor Freight. Sears, Home Depot, and most other supply places have them as well. My rear axle rating is 11,000 pounds, so I figured that placing the jack inboard of a pair of tires rated to carry 6,000 pounds would require slightly more than 3 tons, and 4 ton would be fine. Yet the 5 ton takes more strokes per inch of upward movement, thus I picked 5 tons, so that I would not take forever (like a 12 ton jack would require) but still be able to pump the jack with one hand while under the RV.
The scissor jacks, like used on a car are not going to lift the RV from the frame, the springs will travel to far before starting to lift the RV axle.
I already had a 18" long breaker bar. I had to purchase a 1-1/8" socket to loosen my wheel liner nuts, and already had a 7/8" socket that is deep to remove the lug nuts. But I bought a 7/8" heavy duty impact wrench rated socket, because it can take a lot of power to get the larger lugs off.
I also bought a 6" long impact rated (they are much thicker and harder steel) extension bar to fit into the deep dish rear wheels.
The 9/16" lug nuts on my Class A motorhome with 16" rims should be tightened to about 130 - 150 foot pounds. So a 12" bar required 130 - 150 pounds of force on the side of the end of the wrench. With 24" that means only 65 - 75 pounds pressure. I have 18" so 80 - 100 pounds at the end.
Fred.