As to peaches, Tropic Snow is a white peach, much milder flavor. There is also Florida Belle and Florida Glow. You could also do plums, pears or nectarines if you want to keep it in that "family" (but no need to get this at Fairchild). Stay away from apples as they will require a lot of spraying).
Mangoes will require a lot of work and care from whoever is watching it (as will most plants since it will be kept in a pot). Since it will be overseen by a caregiver, I would not go with cloth pots but that is just my 2 pennies on that subject (stick to a black plastic nursery pot).
Other possibilities: persimmon, blueberry, pomegranate,citrus...