I was going to chime in about the benefits of using a central UPS over small rack-mount units, but if he's just going with an MTS, he's probably not going to be able to do it "right".
Unless these are massive industrial blade server chassis, he doesn't need a 20A circuit for each server. It depends on the type of server, but if they're just PCs being used as servers, they probably draw around 1-2A each. My advise is to put a clamp on there and measure the current, and then buy a SINGLE UPS to power it all. Use the UPS to supply a panel, and feed all the servers from there. KVM and monitors and all do not necessarily need to be on the UPS, but it it's helpful if you have to shut them down when your gen doesn't start. HVAC should NOT be on the UPS, nor should any printers. E-lighting: yes. Normal lighting: no.
If he's on a dime, there are vendors that sell used UPS systems and would be pretty reasonable for a larger system. (I bought a used parallel-redundant 50kVA Powerware system last year as a training UPS for a ton cheaper than buying a new one- if you don't need five or six 9s, you can get away with it.) He's probably only looking at a non-redundant unit somewhere in the 3-5kVA range for 30 PC-based servers. If he can't afford a 10kW generator or an ATS, he's probably not going to be able to afford an UPS, either. He might want to scale down his plans a bit.
On the other hand... 350VA APC Back UPS can be had for about $30 on sale. And a 3kW gen at Lowes for $400.
