Sometimes, the best tool for the job is the one you already have. Is she supposed to go out and buy a new missile launcher and all the consumables that go with it when she's got a perfectly functional stinger in the garage already?
Consumer culture has gotten out of hand!
/s ... kind of???

One of the nice things about ProxMox is that you can also set up a cluster. When OP outgrows it, they can just add a new machine to the cluster and just migrate some VMs over to it.