A depleted A-10 would still have UMass, Saint Louis, VCU, Richmond, and St. Bonnie's. It would still be a notable step up.
SLU will likely head to the C7 conference in a year or two, so they'd have to be replaced too.
If the A-10 added us, Akron, Delaware, George Mason, James Madison, and Hofstra it could work. Then they could structure the divisions like so:
Duquesne
George Washington
University of Richmond
VCU
Akron
Ohio
George Mason
James Madison
Greatest distance between two schools in this division is 450 miles between UR/VCU and Akron. For reference, Athens is is 488 miles from DeKalb.
and
Fordham
LaSalle
UMass
URI
St. Joes
St. Bonaventure
Delaware
Hofstra
Greatest distance between two schools in this division is 297 miles between Delaware and UMass.
You could cut down on travel by playing an imbalanced schedule. Everybody in your division twice, and then 3 teams from the other division.
Or even if you don't imbalance the schedule, there's not any really budget busting trips there. Amherst is a long ways from Athens, sure, but we went there this year out of conference, so obviously we're willing. And 4 of those teams are in Philly and New York, which aren't exactly expensive airports to fly into.