re: Yeah, they should be standard in fact
Two 50 sqM scopes are going to be a lot lot more expensive than a single 100 sqM scope I would have though
You have two buildings, two control system, two mounts, two sets of instruments, two sets of maintainance costs AND all the interferometry hardware.
And, whilst you do gain that resolving power, you drop the sensitivity the bigger single bucket would have got you.
When designing a scope, the finished article of what you intend to achieve with it.
Doug