Portrait Monitor(s)? 4K?

I'm planning on an Ion for a moderately small booth in a High School. To make matters worse the viewing angle to the stage is very steeply down. To save viewing space to the stage I'm considering either or both; portrait mode monitors, one 30"-ish  4K monitor. Touch screen if the budget holds out [:)]

Does anybody have hands on time with such an arrangement? I'd love to hear what was good and what was bad. It's all about the compromise!

Real world experience is extremely valuable. Thanks in advance!

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