I agree with George. Especially now that you can buy individual and accurate digital and lazer levels and angle gauges, which can be used, or used to check and calibrate a hub type gauge, the big cumbersome "machines" that have to be muscled into place are just not worth the trouble.
Your big issue is a level place to work. I have none, so the rare times that I need 'a rack' I just block up and level my car trailer!!!
You need some sort of turning plates, Google that, many ways to come up with those
You need a gauge that gives you accurate TILT at the spindles or accurately mounted to the wheels. A dedicated 'caster camber' gauge is not necessary, because TILT in angle gives you camber, and caster IS FIGURED from that by turning the wheels
You need a way to measure toe. This is greatly eased if you can scare up 1 more person to hold the end of the tape. You need a scribe to mark a "plane" on the tires or on tape on the tires.
If you are trying to check frame/ thrust angle/ front / rear axle alignment, you can "rig" lasers or strings as needed.
I bought a toe gauge off ebay that turned out to be trucks. Hard to tell it was that large in the photos. I cut it down, added a cross bar, and we are in business
"Ever since the Romans" (or maybe the Chinese or before them) NOTHING is more accurate for plumb or level than a pan of water and a plumb bob
This might give you some ideas. It is generally way overblown, but shows a toe gauge and tire scribe, etc
https://robrobinette.com/S2000Alignment.htm
