Anyone built/use a proper smokehouse?

DH has dreamed of a real smokehouse for years. He's been muddling along with an entry-level electric smoker for a few years. After the last batch of Canadian Bacon, I fully support any expansion in this hobby! I'd rather he just skip all the intermediate upgrades and we build a smokehouse, since we'll get there eventually. We have been saving wine bottles (he has an inspirational photo of a smokehouse embedded with bottles to let in light) and there is an endless free supply of volcanic boulders in the area. For money, we could get sandstone pretty easily. And cedar posts are pretty easy to come by as well.

Looking for design tips, especially ideas that will make it easier to use, more versatile, and of course any stacking functions we can incorporate.

One of my brother's built a super dooper smoker he could fit as many as six salmon in at once - he was living in Alaska so the catch volume required a larger wood smoker construction.

Structurally, it was something like is detailed here but tall rather than squat. And, he used a simple rock base - no cement construction.