Get a bar chair/stool or something similar that puts your butt at a good height for standing, spend a day rearranging the desk to standing height. Now when your

Get a bar chair/stool or something similar that puts your butt at a good height for standing, spend a day rearranging the desk to standing height. Now when your feet get tired standing you can just pull the stool out and sit for a while. It's a lot lower-tech than a fancy adjustable desk but it's also a lot cheaper and lower hassle.