PowerMac G5 / Powerbook G4 / Binab V12 Build 31

My G4 Powerbook has finally died which unleashes a variety of alarmingly expensive upgrade options - I've trawled through endless posts trying to clarify whether once I've upgraded to an intel Desktop Mac I could substitute an iPad for the Powerbook?

Specifically - can the iPad run Binab ?

If Realtracks are a problem for the iPad can you set Binab to use the Quicktime or built in midi tracks which are less memory hungry?

Categoric answers much appreciated - and if the answer is 'no' - MacBook Air or Powerbook?

Thanks in advance - richardb