Today I thought of a really cool idea: An evil lair/Secretbase/Fortress/Hang out created in your dreams. Complete with minions and everything. I know one could just teleport to one and have your subconsious just cook one up, but I want to build one from the ground up.

I have a few questions:
1. Will it stay there? As in, when I go back to it the next night, it will still be standing, and as I left it.

2. What would be the best way to convince DCs to work for you

3. How should I go about constructing it?