Maybe as many times as needed to do the minimal in-solar-system observations that were planned well in advance? On the other hand, if they had to budget for a

Maybe as many times as needed to do the minimal in-solar-system observations that were planned well in advance? On the other hand, if they had to budget for a second copy of everything in advance they may have never gotten to launch. Asking for the funding after already having good success behind them is likely a lot easier.