It tends to add up some times. Time will tell I guess.
I ended up ordering a Mini 4 Pro on sale. I think that should do all I want, and likely also some stuff I don't know yet that I want. FPV is interesting, but hard to do alone within the rules and regulations here, so not for now.
Thinking of protective shells - it seems that for filaments it is a thing now to heat (and basically remelt I suppose) any prints that needs toughness in fine salt. (Personally I would think many fine grained powders might do, but salt is fairly heat resistant and cheap so why not). To get toughness across filament layers the concept at least makes sense.