I would think more in terms of total time you have to fill and as best possible use the most fluid means of moving from one project to the next - anything which already crosses over or you already use, do that. your idea is excellent for an album or for a set you can use more than one time, but this is like, crisis situation. you have to be ready in 10 days. 10 days is not a lot to be ready and feel ready. If you don’t sleep it will go badly. I think if you will use the octatrack, half the time will be spent organizing and half will be spent practicing … so where does the third half of time arranging come in? lol you only have 2 halfs to work with. I don’t mean literally, just saying if you are so involved with making it perfect that you don’t balance your time effectively, you may as well save the effort for a later time. If you’ve already started this process before and have a good idea of it already, then sure why not. I think anything complicated is going to be an added stress, anything that already works will still work. Sometimes we want something to be perfect. nothing is perfect. be productive without driving yourself crazy. Set a limit on how long you will spend on one portion of the preparation, your first list should be how long you think it will take to do each of the things you want in order to prepare.
If your list of things and the time it will take to do each (as you imagine them) exceeds the time you have to prepare, you will have to find a way to do it in less time. Just being prepared for that eventuality is going to be a strength, otherwise you will be up against a wall. no one wants to feel that way I think.