This one took about 1 year exactly to complete, which was well over 75 hrs in the building, forging the bolts and trunnion caps, making stain, and finishing, and that doesn't include all the time standing around in my friend's garage doing all sorts of b.s. I still plan to add some chains to the trunnion pins, and I need to make a worm. Of course, we were making 2 identical carriages at the same time, but the actual work time wouldn't be halved for just one.
Buying one for $129 would be a bargain, though I'm much happier with mine than any I could buy, even though I've got about that amount just in materials in it.