I own a Big Green Egg and an Oklahoma Joe's. I use the BGE for everything though and recently bought a second egg. So, I'd recommend the XL Egg which should fit just about anything you need for a family of four.
I have two Big Green Eggs, a Medium and an XL. They're amazing and I would highly recommend. I haven't tried the off brand BGE but I can't imagine they're any worse.
It's been nearly 10 years since I've dehydrated jerky in the oven, but my dehydrator crapped the bed. So I am wondering who all does their own dehydrating? maybe we can share recipes here.
My favorite place to eat any and all Tacos:
Las Margaritas
Midtown
1842 Cheshire Bridge Rd
Atlanta, GA 30324
(404) 873-4464
https://www.lasmargaritasmidtown.com/