@SmartBadger - you CAN dismantle and relocate the current hub.
you CAN craft storage boxes and crafting benches and Biomass generators for your remote outposts.
"Currently" (read - in the limited alpha) the only things the HUB does that can't be replicated elsewhere are the MAM research and the blueprint / tech tier advancement.
personally i see no need for more than the one hub. 'hub' after all is the center - not the spokes or the rim.
If you are REALLY concerned about being able to do more research or advancements while you're away from home, dismantle the hub and take it with you. It'll take a LOT of clear space to place it down compared to a Crafting Bench - but that's just another problem to overcome. And don't tell me you need to leave it at home while you're away - i'm sure you can make more biomass generators to compensate.
in multiplayer the advancements are shared, so whoever comes to the hub and donates the last products can hit launch and everyone benefits. If you have a Friend that wants to play in the same world, but seperatly - the research is the only overlap (MAM or Tier advancement)