My two cents. I love corns. I have 2. Despite having 3 boas, a Carpet Python, and a ball python, I still love my corns. They come in every color imaginable and pattern too. They are docile and active and great eaters. They do start out very small, but grow fast.
More than 86F and my corns get antsy and uncomfortable.
Because of the cages (Boaphiles) I use and how well insulated they are I range from a 84-85F hot spot down to a 75-77F cool side.
Having said that, a corn will do fine with an 84F hot spot (they need over 82F to digest properly and quickly) and a cool side that's room temp. As long as they can get their body on the hot spot completely.
That bin will be fine even for a younger corn as long as you give enough hides.
If you are looking for a corn I highly recommend Don Soderberg at South Mountain Reptiles. I bought Solana, my scaleless corn from him. Great guy and great animals. I think his website is cornsnake.net, and he picks up the phone if you call and want to talk shop.
Good luck and let us know what you decide or if you have more questions.