first of all, don't curb drop with a load if you can at all manage it.

secondly, if you're mechanically inclined, then build your own. You'll get a strong wheel from the start since factory built wheels usually need to be retensioned anyways. I'd say that even more important than a truing stand is a tension meter since your bike doubles as a stand. Even tension that's not too high or too low is IMO the most important thing in builds, even more important than absolute trueness.

as for the rim, some options are Mavic A719, DT swiss TK 540, rigida/ryde sputnik