Any reason you need to encrypt the host OS information? I would assume anything interesting would be in the VM and you could probably have the VM encrypt it’s own storage.

To make sure there is not a misunderstanding, the wattage of a PSU is not how much power it will draw. The wattage is how much is can supply. So if you have a 1000w PSU, but all your components draw 200w of power it will use about 200w of power.

Additionally, if you plan to get a lot of HDDs in the future, do some research on power rails. Some PSUs are designed to only be able to supply a small amount of power to things like HDDs because most people only have 1 or 2.