Looks good and TIDY!
Is that a screen in deck?
No, I thought about screening it in. It's the area under my deck by the basement.
I have a hunch no matter where you put the new smoker a bit seeps into the house. Looks like the #3 is close to door or siding?
I am used to that, my other smokers always "perfume" the basement as well. It is close to the siding but I'll pull it away when cooking. I just put it there for the sake of having it in the group shot. My Traeger which is right beside it and that's it's normal spot.
Sig picture shows my "novice" set up but works fine so far.
I don't see a sig pic, do you mean your avatar pic? If so, it's too small for me to see what ya got.
Which cooking devices are now for sale after you got the #3 SI?
None! They all serve a purpose. I've only cooked one thing on the #3 so far, and it was excellent and I'm sure there will be many more excellent things cooked in the not so distant future. My Kegs are the mainstays of what I do, the one not in the island goes with us on trips even. The Traeger makes the best chicken out of any grill/smoker I've ever owned, so it's safe. The gasser is a built in, so it's not going anywhere. So, you see, it's just all one big family of cookers and that kitchen is their home ;D