There's not much Dual ESCs under $200. You might be able to get an 8S APS for under $200. So far VESC is only a single unit and you would just connect two through CANBUS. No point really to make an actual Dual ESC. It's better anyhow since if you do mess up one. You don't need to purchase an entirely new ESC just a single.
The dual ESC started from APS/Flier which isn't needed. The only other with a dual ESC would be certain production companies aka boosted who have their entire PCB built into one pcb.
I know Jacob is working on a windows version for VESC as well as Apple.
It's always better to spend more on quality products then purchase mediocre products which break in half the time span or less of a higher quality option.