You probably already thought of this, but if you are using two machines to make blocks, how are you going to make sure all the points match up? I made the mistake once of using two different machines to make quilt blocks. The 1/4" seam was just slightly different on each machine. When I put the blocks together, they didn't match. I found a way to make it work with sashing, but that's another story. The only answer I can come up with is to use paper piecing. It will ensure that your blocks are the same regardless of the sewing machine and who is doing the sewing.
If you want to do a DWR, I would highly recommend
Eleanor Burn's DWR pattern. I was very successful with this technique. I have made two and used the applique method.
Good luck and I hope this helps!