Thanks for the input so far. My intent would be to run on gas with propane only as a backup in the event I run out of gas and can't get more. I haven't ruled out a gas only.
As I said, I'm in the research phase. I plan to purchase in late spring. Typically in Florida, we have a tax-free week for emergency preparedness supplies and generators are usually allowed. The only issue might be the cost limit. I think it was $750 last year. But a lot of places put them on sale to try to drive business so you can still find deals even if it isn't tax free.