Greenhouse recommendations?

Hi friends! I have a very ambitious question and am hoping you can make a recommendation to help me bend nature to my will 🙂 I live in Gilbert, AZ (9b) and am about to move to Cedar Rapids, IA (5a). I have a lot of citrus trees that I am trying to find a way to not part with and want to erect a greenhouse that could allow me to utilize an electric or geothermal heating system to keep them alive through the Iowa winters. I know a cheap plastic option would be out of the question, but does anyone have experience or recommendations around a sturdier greenhouse with better insulation where I might be able to keep these from freezing over the winter with some added heat so I don’t have to bring these inside? Any recommendations would be much appreciated to help me grow citrus in IA! Thanks in advance and have a nice day!