We don't have a "hutch" it's a huge dog house like thing (I'll post a pic) that's 8ft by 8ft. There's heat lamps in winter. I've got cats, and many other indoor animals. Idk, I wouldn't want the poor thing being in a dog house that's too small
I really think because of their size and want for human companionship Flemish (especially if you just get one) they should be indoor pets. Mine was kept outdoors in a hutch with wire floor with her mom and siblings but I really don't think that's a good life for a rabbit unless you just plan on raising for meat you know?
Maybe stick with a smaller breed for now until you have a better set up?