I used to try to do that. Now I keep a list of potential palaces and do everything just-in-time.
Preparing a memory palace is just yet another skill. At first it seems like a big "job" to do. Later, it's like nothing, you float through it once, done. Especially if you reuse systems like Roman room because that makes a lot of decisions by rules.
Also because you're trying to link knowledge to what you know well you don't need to have amazing recall of the place. Just a sense of a room that you know about, eventually will be enough. If you can recall furniture or whatever, then use that it will help. But if you're straining to recall... you might not get much additional benefit by trying to photographically document the space in your mind.
