After you submit the form, your request goes to a local electrician or generator installer serving your area. They will get in touch by phone or email with a few questions and, if it makes sense, schedule a site visit and send a written quote. You pay nothing and are not obligated to hire anyone.
Details that help: natural gas or not, the panel size if you can find it on the main breaker, whether the lot is steep, what you most need during an outage, and for a repair, the generator brand and any code showing on its display.