Wells Fargo is a horrible basketball venue. Drake would need a period of 5-10 years of sustained success before we can even talk about drawing 10-12k at which point that arena would be 15+ years old and not aging well.
If Drake could sustain basketball success/support and had the money I think they would fully renovate/expand the Fieldhouse (this is on deck at some point for being a warmup facility for the Relays) and then convert Knapp into an actual basketball (well, and volleyball) venue. Permanent seats, etc.