Your solutions involve modding and are second-rate because of this. Generally accepted appropriate science is anything that can be done with a fresh set of raws.
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This has been my current method of vampire feeding - assuming adult vampire. To the left is the containment area, where the vampire resides and does whatever he's supposed to do (ie, chair for a manager, etc). To the upper center is an airlock with a bed in it. This bed is assigned to a child. When the child goes to sleep, you lock the outside door and unlock the inside, thus trapping the child in the room with the vampire. To the lower center is a set of small stockpiles. These should contain booze, food, and corpse piles. The food stockpiles should be set to "take from" the main food stores, and the corpse can be left alone. Disable barrels on the food stockpile for simplicity, prepared meals work best. An additional barrel stockpile is usually needed to retrieve used booze barrels, or you could make the vampire into a brewer, or have a well. In any case, you'll need items to keep the child(ren) alive.
When the cell needs to be stocked, you open the fort-side doors, in this case floodgates due to the large opening needed, and lock the vampire-side doors. Dwarves will quickly take food from the main fort and load it into the airlock. You then shift doors, closing the fort and opening the vampire. An additional stockpile in the cell should be set to "take from" the airlock piles, thus encouraging the vampire to move items into the cell. At the same time, if the vampire has killed any children he should quickly move the corpse onto the designated corpse stockpile. Windows may be needed to encourage others to "discover" the corpse, in which case the top wall of the small bedroom would be ideal for a window.
It's a bit of micromanagement, but allows you to keep vampires separate from your fort with zero possible contact, except children and/or useless migrants. An additional door can be installed in the cell, allowing the vampire to exit the fort and face a siege. Barracks and equipment should be provided in the cell for the purposes of training and not being naked.