I have to assume that you are asking about this from a business perspective, I just can't see a home hobby woodworker being able to justify the space, infrastructure (electrical) requirements, and cost of such large high end machines. I guess it's possible, but the analogy of buying a Ferrari to run to the corner Circle K is very appropriate.
So the question for you would be, what are you planning on doing with it... What is your budget in terms of space, power, and money like? Are you actually going to face joint 20" wide stock?
For my home / hobby workshop I am doing quite nicely with a 13" lunch box planer, a 6" bench top jointer, and I am in the process of building a 1HP 24" thickness sander. (have the discs for the drum cut out, need to clue them, and true them up on the lathe)... Any greater width and I am taking out the #5, and presently looking for a good #7 bench plane to true up wide stock...
Trying to follow the example of the master...