pleased you are taking your time
and considering all options.
The Yoder is not cheap , in any way.
maybe to 20 years for me to get to the WHPS.
what do the gravity feed charcoal units correct about
pellet grills ?
for quite some time there are accessories
that are PID'd controlled
that regulate air intake for charcoal burners
that can be sealed : Weber , Eggs , green or other shades
maybe you should look into that accessory
my friend in WH has that accessory and has used it
for his BGE, and liked it as I recall
cheers
P.S. : this sort of rig ?
https://www.masterbuilt.com/products/gravity-series-560-digital-charcoal-grill-smoker