I've been using 17 different BBQ, most of them gassers, over the years.
At last count, 3 of them were deliberately chopped up as economical smoker BBQ.
Junk. Sure, I could have spent a fortune on a fancy one.
But, BBQ restaurant people show that it is not at all necessary.
You buy a simple 2-burner gasser in a yard sale.
KEY POINT = twiddle the gas valves. If they still turn smoothly, OK. If they are stiff/hard, walk away.
Replace the burner, maybe $20.00. Next, use bolt cutters to cut away 1/2 of the rock rack.
You want to be able to put a 6" cast iron fry pan of smoke wood right on the lit burner on that side, the "hot side".
Stack up the racks of ribs or chickens or lamb shanks on the "cool side." Got good dry herb & spice rubs?
Running on low, an oven thermometer should show the meat sitting at maybe 275F - 290F.
Put a disposable Al-foil fat dish under the meat with water or beer in it for moisture.
Great. Smoke for the first hour, no more or it goes sour like creosote.
Just leave it all alone. Chickens and ribs are all the same.
Big enough, yes, you can do potatoes and corn with smoke and low heat, too.
I might wrap all the meat in foil for the last hour so it does not dry out and cooks in its own juices.
This is not southern US traditional style quite at all.
But for cheap, it tenderizes the really cheap cuts of meat. Falling off the bone yummy.
Next up will be a meat rabbit. Apple or apricot glaze over a good dry herb and spice rub.
Rabbits are dry and I need to seal the surface. Either that or a "wet mop" with a kicked up apple cider.
Then I have a couple of cheapo beef hearts. Stuff one and wrap with bacon.
Smoker BBQ is a new leaf in your cooking.