also a 64GB flash drive usb 3.0 can host a VM eg win 8.1? If yes, VM must setup Saved as one file or many files?

VMware Fusion® (for Mac)

I plan to buy a Yosemite Mac and have guest VM Win 8.1 (or Win 9 after released) plus VM Ubuntu 14.04 plus VM Blackberry emulator [that in windows requires VMware free Player] ... what are the solutions from cheaper to expensive?

also a 64GB flash drive usb 3.0 can host a running VM eg win 8.1? If yes, VM must setup Saved as one file or many files?

To run 8.1 windows as guest requires upgrade my (win 7 host) VMware free Player ?