I have no experience with these things but I would think LONG and HARD before making a decision.
Firstly, will she/he be socially awkward not having the same social experience as his/her peers?
Will she/he have attachment issues (home all day with Mommy/siblings)?
What if this situation cannot go on for ever for a dozen reasons that can come up and she/he is suddenly thrust into school at age 12, 13, 14. Would that be traumatizing? Will she/he be able to adjust?
I never really thought into this but these are just things that came to mind right now.
(Also, is this an issue of Al tifrosh min HaTzibur?)