draw.io. you can save directly to google drive as well.

yup. i’ve heard quite a few reports that wireless is decent, but wired backhaul is way better. only reason this won’t work is if you need to use the ports on R2 to wire anything

if they were wireless all ethernet ports would be available for wiring clients. with wired backhaul, you’d need a switch before or after R2 to take advantage of wired clients and wired backhaul