I think this is a great question---academia is still finding out how expensive software development can be. From my experience in the UC system, 35-50% of this

I think this is a great question---academia is still finding out how expensive software development can be. From my experience in the UC system, 35-50% of this will go to grant administration overhead. After factoring in benefits, my guess would be one senior and one junior developer for 2 years–if those developers are willing to take rather large pay cuts to work on a public good / neat project (thankfully a lot are!).