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You should make sure the dedicated has dual Ethernet adapters for redundancy. You will need 1 ip IPv4 or 1IPv6 for each container.
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For a dedicated Machine, you should make sure it has at least 72GB ram or more, SSD RAIDED for the O/S and also separate SSD's raided for the volumes that will hold your VPS VHD. Find a good host who has Hyper-V technology and since you are looking for volume systems I'm sure someone will provide a decent discount. This will be an expensive endeavor done properly. IPv6 could work with a domain attached for simplicity sakes, not too many people will want to enter that long sequence to get in. Hyper-V in an excellent choice as you can dedicate the resources to each container. You will need a good solid machine for this type of hosting.
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