i'm a retired single half timer and social security is my main source of income. my camp hosting takes care of about half the time i'm away and roaming consumes the other half (is that too many halves?). anyway...here's my take on camp hosting. first of all, there's no "entry level" since hosting is a single level gig. you're either a host or you're not. one thing to remember is it's volunteering and that's more important than you might think. when i started the hosting stuff i never expected the reward that i felt from helping out. all those government agencies that provide camping facilities really need help what with budgetary cuts, etc. and a lot of folks benefit (campers) from your helping. you build relationships with the agency staff (most are nice) and the campers who are mostly nice also. i'll be returning next spring for my fifth year at one small park on the cost of sc and i'm already looking forward. you're not gonna make any money from all this and can only hope for a free site with hookups. for that you have minimal duties and a pretty open schedule. i choose where i want to host by location mostly. last october was spent in the mountains of maryland watching fall
happen from one spot. it was amazing. it's been my experience that when dealing with the government, references from other agencies are not a big deal. mostly, the agency you're applying to is concerned about you passing the background check, doesn't matter if you had the same check by another agency they want or need to have their own "paperwork" (it is government after all). steer clear of facilities operated by concessionaires. the profit motive is a big deal and they try to maximize the return on their investment in you (and are most likely to be the places that insist on couples for hosting). i feel like if you'll need to conform to corporate mentality you may as well get paid for it and should look at some of the private campgrounds that actually pay you for being there and doing odd jobs.
full time hosting will save you some bucks by not having a stick & brick place but, eventually you'll feel the need not to host and then you'll have to to pony up some rent for a site. that's why i still have a house. sort of a spot to regroup & maintain. i've lived here for over 35 years and it's not all that expensive to keep. i have a room mate and his rent helps defray my overhead plus there's someone here while i'm gone to guard my treasures.
so...perhaps a good approach would be to seek a hosting position at a place you'd like to be for a month or two and give it a try before making any lifestyle changes...try it on, see if it fits then take it from there?