I would never have a rabbit in the house either. Mine are strictly outdoor rabbits.
*I* would think it would be too stressful for an eight year old rabbit used to living inside. Illinois gets pretty hot in the summer and pretty cold in the winter.
If you do get this rabbit IMOHO, you would need to keep a careful eye on him and make sure he doesn't get too hot or too cold. You'll need to be diligent about keeping out cold water and maybe containers of ice, and maybe a fan. It's hard enough for me to keep my outdoor rabbits cool in the summer. Summers are hard on rabbits.
In the winter, you'll need to make sure he has someplace to get warm if he needs to. Rabbits are pretty cold hearty, but Illinois gets pretty cold in the winter. I'd research how much cold they can actually take. At some point (I don't know what point) you might have to be able to put out a heat lamp or provide extra bedding. Better to be prepared and not have to need it, rather than need it and be without and be sorry later.
Just my own $0.02 about that. Maybe someone else who has rabbits can offer better advice.
If I were you, I'd start out with younger (kits) rabbits that way they can get used to the extreme weather spikes.