Part of the point behind Ventoy is that you don’t need to prepare the USB to be bootable. You can just copy/paste the whole iso into Ventoy and it will be bootable. New release comes out? Just copy it onto your USB drive. Don’t even need to remove the old version of you don’t want to.
Makes things much easier in the tech world for having a single USB with 50+ bootable tools and installers on there like with MediCat (which uses Ventoy as a base).
Only thing I’ve had issues with booting from Ventoy is the ProxMox install iso. Everything else has worked first try.
Pretty sure most hosting platforms have egress costs on their cheaper VM instances.
I know Google cloud charges for bandwidth to AUS, and Oracle is 10TB of egress per month before charging (which I think is the most generous of free/cheap hosting platforms).