Hi;
As much as I understand, depending on the technical requirements of the selected MNs, I can install as many MNs as I want on my PC / workstation / server or VPS.
Thank you
Yes, they have small requirements. I think it's no different than running multiple wallets of different coins at the same time. Just check CPU/Mem usage after installing each additional one and you're good do go. If you have good internet connection, plenty of space and RAM you should have no problems.