We have pink bananas, they are just ornamental, not edible. They open before turning to sugar from starch and filled with seeds. Fish tank heaters and tubes of water installed into the ground or in a greenhouse will keep things warm cheaply. I would go with grafted citrus. Minneola tangelo, you can order them from Florida once it gets warmer. I think nursery that mail plants are.
Top tropicals
Lara farms
Pine island nursery

If you kept bananas and papayas alive though you could likely keep some other grafted trees alive like sapodilla, white sapote, green sapote, cherimoya, etc