The really nice thing about tank farms in space is that people can live in
the tanks, safely!

the three pillars are

1) lots of water up there, as cheap as possible - big one shot boosters just
getting to LEO
2) use the boosters/tanks as habitats as well - dual use designs that look
like the enterprise on the INSIDE
and never return anything....
3) a little taxi tug escape pod, either stick launched or piggy backed on
Big Bertha - the langley dingus looks good but may even be too
sophisticated - make it like a stone axe...

and thats it - let the permanent space colonists work out how to make stuff
from water, poo, light, bugs, and crops and animals, take some risks with
inflatables too, just for fun... just get them up there and let them make it
up as they go

once folks are up there the most economical places to get resources are
already up there - moon, asteroids, solar insolation, JUNK ( the best way to
get rid of space junk is to make it valuable), or even a space snuffler
vacuum cleaner to harvest the top layers of atmospheric gas.... a little
skipper (skippy?) perhaps

and if anyone wants to go, permanently, LET THEM GO....

plenty of room for space casinos and toy companies too...

jeeeez I hope this happens