I'm going the lazy way with my RIMS system, but the plan is to come up with something someone can put together with mostly off the shelf parts who don't want to wire up boards or try to source a welder if they can't do it themselves.
I will be building the brewstand itself using 80/20 t-slot framing. This will make it easier to bolt on various items in the stand or install shelves on the bottom to slide in between the slots for the propane tanks. There will be a circular hole cut to allow the tanks to dip into to use the lower lip for support. There is a chance that it may be cheaper to source a welder after I'm done pricing out the rails, bolts, and framing joints. We'll see.
I will be bolting the burners into the t-slot framing. This will allow them to sit above the framing, be secure, and allow the burner arms to be extended for larger kettles. I plan on bolting two pumps and two flow meters to the stand to monitor the flow rate for the mash recirculation and the sparge.
I will also be using the blichmann controller gas modules. They will come with the right gas valve solenoids for the burners and the right temperature sensors. I will bolt them the stand too using a top shelf extended from the stand. The auto ignition parts will also bolt directly to the burners.
This is just a rough explanation and there's definitely lots of ways to approach it. I also like the ability to program the controllers with different profiles using software and the data cable. Another way to speed up the automation, but not necessarily needed. I'm going with the easy, but probably tad more expensive way.
In terms of kettles, I'm using Stout gear.