Glad to hear you've got some good ideas.

One thing that helped for me with the tiredness/resting was putting a single bed mattress on the floor in our toy room (or where ever your DS plays). Then I could lie down comfortably with a pillow and I would actually get a bit of rest while they played/climbed on me/read books together. Much better than just the floor!

ETA. My grandfather used to say: Why stand when you can sit, why sit when you can lie. That should be your new motto!