Messing with hardware cloth is my LEAST favorite part of chicken keeping by FAR! I think these are tin snips--best I've found for cutting it. If you get it in the right position, you can almost cut it like a bolt of cloth rather than one wire at a time.
That is what I use as well. Or tin snips. I've also used some old long all metal scissors. It helps to hold it on its edge and seperate pushing what's already cut away from you and your hands as you cut. It can be very sharp. I have cut myself many times trying to cut it laying flat like fabric. I can't do anything with gloves on so this is best way I've found to do it.
I have a multi tool so what kind of blade? I have some issues with my hands so power would be amazing, and I quilt so used to marking straight cuts etc. and have amazing rulers to help. Also what type of marking tool?