We have a flat top electric and we use cast iron. It took me quite awhile to get used to electric. We had always assumed we were going to update our kitchen and get our house plumbed for propane. I've now told DH it doesn't matter, I'm so used to electric and I'm fine with it.
Electric stoves are supposedly better for people with MTHFR, too.
I clean my glass stove top with my regular homemade vinegar spray for daily cleaning. To get it shinier, I use microfiber. If it gets really bad, I clean it with a little Bar Keeper's Friend.
We had forced air central heat in our home in WI. We had the ducts professionally cleaned once. I say if you feel like you're constantly dusting, have the ducts cleaned but do not get the spray treatment that they offer, supposedly some kind of antimicrobial. The main thing with forced air heat is to get good furnace filters and change them on schedule. I'm sure your DH can stay on top of that.