Can I cut a 2" thick marble slab myself?
I have cut one inch granite and it went very well with one exception to your list. Make the cut in a single pass or you will have lines on the cut face. You can use a good circular saw because the small water flow will stop essentially all dust; there will be some water spray that contains fine particles but no problem. I have cut cinder block dry and that needed a "sacrificial " circular saw. Breakout was not a problem when going slow at the end of cut. What I did for water was use a gallon bottle with a 1/4 vinyl (aquarium) hose with a clamp or valve for control; then you can make the mess anywhere.It requires little water and it will run down the cut groove to the blade.