I would say the main problem will be the requirements of the Windows OS towards your virtual hardware and virtualization application. The base Mac Air, unless upgraded with more RAM and bigger SSD for better performance of the storage subsystem, might not be the best option if you will run Windows 10 guest.
RW... is not really putting any load on the OS in terms of CPU and Memory according to my observations and usage. But again I never used humongous maps that reach the limits put in place by the developers.
