Anne, I saw your previous but didn't answer because I don't know much about the hybrid units except that they're mostly designed for difficult places to live where both the electricity and gas delivery are iffy. You're in a similar situation with the electricity, of course, though your propane deliveries are probably pretty reliable. You can light most gas cooktops with a match or lighter (a pistol style lighter, or any kind with a long nose, is a safer choice).

I have 24" (Gaggenau) induction, which has a similar configuration to the Wolf, and the 15" Wolf 2 burner gas under a 48" hood. There's about 4" between the two. Big enough for a spoon rest and the pepper grinder. You could certainly make it wider. You'd have to ask Wolf how close together they could be. Modular cooktops usually only need about an inch because they have a piece that links them together. I don't know if it would work with the 24" induction, though. It may require a more secure side brace. It's worth making sure that it's secure enough to handle big heavy pots.

I like my Wolf gas cooktop. It has a medium and a small burner. I find them adequate. But I have the induction for more high powered cooking. I mostly use the induction. There are a few things I prefer gas for, and I use it when I need more burners. When we have had power outages, they've been local (less than 1000 houses), so it has been wiser to go hang out where there's power, a few miles away, than open the fridge and letting out the cold air. The food is good for at least a day if you don't open the fridge. I did light it once with a lighter, though I forget why. Maybe it was an outage. Perhaps we were making tea. I wouldn't want to do all my cooking on it. It's a small space. But for a few days here and there, and for meals rather than artistic expression (i.e., stew not crepes), it should be fine. It's a heck of a lot better than a camp stove!

Choosing a layout should be done in the context of the cabinet construction and strength of the countertop. I would separate two units to fit the cabinet layout and to provide room for cabinet walls to supply sufficient strength for stone support between them. Alternatively, the cabinet can be designed with an adequate counter support beam between them and otherwise be open below the gap. What is needed will depend on how heavy the units are and stone strength, if a stone countertop is to be used.

And yes, this costs more hood, more blower, and more make-up air.

kas