NOTE: Since these are a lot of work and I'm not sure if I'm super sold on this formula anyway, this will probably be my last class-specific Bastion. I figured since I had already done the classic Fighter, Mage, and Cleric bastions, I might as well round it out with the Rogue one. If you like this system, I hope these serve as useful templates!
You are awarded a Bastion when you reach 5th level. During downtime, you can invest gold into your Bastion to upgrade it with new facilities and services. At the end of a downtime, you can choose a number of available services equal to your proficiency bonus and gain their effects until the end of your next adventure. You can gain multiple uses of the same service unless otherwise stated. See the original post here.
Criminal Bastion: Hideout
The hideout is a refuge from the law, a place of clandestine deals, and a repository of secrets and treasure. As a criminal, you can use your Hideout to gather information and augment your arsenal with less-than-legal implements.