It works out fairly well for retired military IF you maintain a budget and are not living beyond your means.
When I went through military separation classes they taught us how to get back in to civilian life and seeking civilian employment. They asked each of us what we wanted to do after we separated from the military and when I said I would be a work-camer they looked at me funny. Just so happened a retired first Sargent was work camping and he came and spoke to the group. Then he spoke with me personally and attempted to discourage me as he felt it was a loosing proposition and not sustainable.
I sized the guy up. He was wearing designer clothing, had a neck full of gold and drove one of those expensive Chevy retro-pickups. His rig cost three times the cost of mine and he was in debt with it all so naturally he had a lot of overhead. I quickly discounted his experiences as to how they related to me as everything (except the rig) was paid off. I had two house mortgages but they are rental property so they pay for themselves. I have insurance and Mailbox expenses and vehicle registration expenses and that it all.
My pension is around a grand per month and I have about half that in expenses so I survive on $500.00 per month. Any job I can get or any gratuitous work I can take pays for the travel and cost of living.
I do not buy junk unless I really need it and I take care to take care of what I have and do as much work myself as possible.
Medical is through the VA or Tricare and groceries are not too bad as I do not eat too much. I do not go out a lot and find free things to do whenever I can.
The key is to maintain awareness of your expenses and do whatever you can to keep them down. Imperative to that is learning as much about routine maintenance on your equipment as possible as the greatest cost in repairs and maintenance is Labor fees. Parts are not too terribly expensive for the most part but the labor cost in installing them is murder!
An example is I recently had to replace the flush valve on my toilet. The parts cost $35.00 but the labor to do the work would have been three or four times that much. I took the toilet out, replaced the failed part and replaced the toilet myself for only the cost of the part and the tools I already had for years of use.
Same with the delamination and water intrusion on my rig. It would likely have cost several thousands of dollars to repair but I did it myself for around $500.00 in materials and parts and feel I did as well as any other guy would have AND did BETTER job sealing everything back up than even the manufacturer did when they built the rig.
As long as I can do some sort of work in exchange for a campsite at reasonable hourly rates or find paying jobs as well I can survive and still travel. That is where Amazon is such a good opportunity. The work is strenuous but the compensation is very fair.
Most traditional jobs are minimum wage or a little more without any other benefits but Amazon pays a fair wage PLUS covers full hookup camp site fees on top of that. Sure, it is not for every one but for those of us that can do the work and are willing to do the work it is really nice to have it offered. ALSO, these Amazon jobs are some of the better paid in the work-camping world. Most other places pay less and require more. Sure, it is hard work but most factory type jobs are.