Realistically that is infeasible and likely undesirable as an absolute, but as a general rule I would oppose spending significant public funds on a professional sports facility, because the promises are always a scam and the rewards are nowhere close to the costs. Maybe some costs on the margins, but nothing significant.
The Athletics are also trying to put their park in what may prove to be an extraordinarily inconvenient location for Oakland (particularly the Port). Even without the public outlays, that decision would be controversial, especially when the current Coliseum site is just fine.