I'm thinking about a small "outdoor kitchen" when I add a screened
porch on the house. I'd like to have a nice gas grill built into a
concrete countertop, ideally with a burner on the side as well. The
plan will also include a ventilation hood.

It appears the built-in models are about 2 times the cost as a
freestanding grill. Can I just buy a nice webber grill and retrofit
it into the space I need?

I have a natural gas line nearby, so I plan to hire an experienced
plumber to connect the system up for me. Yes - I will buy the right
burner elements.

Thoughts?