If I were doing this, I would take the French approach. Put your weight on the (by definition stronger) front wheel with an appropriately designed rack (braze-ons! Tubus/Nitto!) and use a hub that has either keyhole flanges or wide enough flanges that you can get the spokes out without removing the freewheel. They do exist. A good rear Maxicar with a solid axle (no broken axles!!) can be had for less money than a modern boutique hub. Hell, if you look for a little while you'll find one for less than many things from Shimano. Lace it to an A319 or Rigida Sputnik with Sapim Force triple butted spokes, and replace spokes without taking the wheel off the bike.
Last edited by scarlson; 08-29-19 at 01:34 PM.