Sure! But here in Europe you can buy a digital Windows 10 Pro license for 10€. It’s legal, and it’s recognized by Microsoft: it’s like buying that license with a new computer, but in this case your computer will be the virtual machine. If you ever delete that virtual machine, the license is not valid anymore (it’s like if you had thrown away the computer).
And about the minimum requirements I said that you will need a decent CPU and enough memory: my cpu is almost 6 years old (i7 4790), and I have 32GB of memory. It runs fine here. But of course if Gimp is good enough for you, go for it! I was just pointing to a valid alternative