+1

If you use light rims meant for lots of spokes, you'll be in trouble. The 36/20 combo doesn't sound good either, I have no idea how you'd do that. Now if you had a 40 hole rim you might be able to do it.

I had a 16/20 spoke Velocity Deep V wheelset and it actually seemed pretty strong, so that's an option if you can order the rims somehow.