Good morning Pops69, Welcome to the site,You have lots of questions and I'll try to answer them for you.
First, as far as dealers in your area, I'm not sure as I live in Maine but am a factory rep and will be happy to ask the office regarding your zip code and I'll PM you the info if you like, we do sell direct if there is no local dealer and it's then my job to help with any questions you have from that point on, I will PM you my info in a bit. Delivery comes on an independent carrier with a tractor trailer, it is the customers responsibility to line up equipment to off load it from the trailer SAFELY, they are heavy.
Sizing, we should have a bit more info on that one such as are you including basement, hot water, how well insulated and do you have backup heat as well. The best way to figure out heat load from this distance is by a local dealer or a history of how many BTU's your home has used in the past, (cords of wood, gallons of propane / oil or cubic feet of natural gas ), Please don't cut yourself short here and don't buy on the future sizing as we really don't like to oversize either, at this point I would say the 28-40 would do the job just fine but let's be sure.