I can see a single use bolthole for a Recon Team, their job, after all, is get off their collective rears and explore their area and make contact with the locals.
I've seen several games where the PD allowed a permanent base and it resulted in the team going to all of their caches and transport the treasure back to home base...
I can see such a base for a Science Team or possibly a MARS Team, but Recon...