A small self contained rack (with TH2G) can sit on the des in my office or in a hotel room along with my Hog PC. However, you're point is legitimate.
Got one, do use it. In fact, have considered a programmable DMX router so I can switch the macbook DMX fast to each Catalyst in the rig.
By not using monitors, I eliminate a failure point in the line by using distributors. Very good point.
Marshall makes Rack Mount LCD monitors that will receive DVI and VGA. They have 2 screen and three screen models. The range from $2000 to $3000 USD each. In a year or two there will be different models but the rack footprint and profile will not change.
Yes these are freakin expensive but it would be a turnkey rack that is instantly available.
My philosophy is: If I can save a client can save a potential $10,000 per day expense because I have technology that can setup and program faster as well as program off site, then it means I have become more valuable and therefore can reap higher profitability.