MAN already has a lo cost terminal. Its called T3. It was built on a tight budget, check out the painted breeze block walls and lino floors ! Baby already use it and as soon as that BACON lot move out its open for Flybe.
T1 as much as they tart it up and adapt its still a 1960s building that is not on par with modern terminals.
If money could be made available I think that T3 should be expanded ASAP (as per plans) T2 extended to the west and then T1 completely knocked down and rebuilt.