Best of luck with that… whilst I don’t doubt that you’ll manage to learn your system within the span of a week, I’d be very surprised if you could also get fast at it and put it in the back of your mind.
After all, the main task is to create a compound image out of three cards and place it into the location… and I mean actually place and not just use the location as a backdrop. The “which image for which card”-part should be as noticeable as the emphasis you put on individual vowels and consonants when reading the words in this very sentence here… i.e., nonexistent.
Nothing wrong with the approach but there are more things to consider. Personally, from what I’ve read on the forum over the years is the lack of memory palaces with people just starting out. Bear in mind that you can’t use one palace with 17 locations over and over on the same day.
Basically, if you want to do two decks in the morning and two at night every day, you’ll need eight memory palaces. You want to have four for the first and four for the second day and only then repeat with the palaces from the first day.
For more just search the forum: https://forum.artofmemory.com/search?q=speed%20cards