I agree with you 100%! I lived for over a year on an air mattress after I split from the ex. At first because it's what I had, then because I liked it. I just broke down and bought a memory foam mattress from walmart for $200. Queen size and all and I love it! Helluva price on that! I also wear flip flops as much as possible and don't care abut style so much. I do my own thing and usually wear out my clothes because I don't like change. LOL
My current plan (always adaptable of course) is to develop residual income. You've already touched on a few things like making money from blog posts years later (recent vlog I do believe), kindle books, etc. There's a ton of ideas out there! But once my spawn go out on their own, I'm selling all my stuff, getting a camper and heading out. I can still work when I want, but that lifestyle will allow me more freedom to go where I please. Many fellow veterans have been doing that and I've been following along on Youtube.
Like I said I can always adapt the plan, but staying single, keeping costs down, and having multiple streams of income will be the key. I have 13 years to figure it out so I might as well start now! LMAO!