Sure, the Bills are solvent TODAY with no stadium debt and a committed owner. Solvent yes, but rarely able to spend big in free agency, therefore working from a competitive disadvantage. The one big FA splash, Mario, was financed by the very Toronto series the petition folks rail against.
OK, now fast forward to the future... with a successful petition effort you have a continually shrinking local market, curtailed regionalization efforts (happily curtailed by petition signers), rock bottom ticket prices, minimal (unshared) suite revenues, a band-aided stadium and, gasp, an impending ownership change.
Faced with this scenario, would a prospective investor group interested in keeping the Bills in Buffalo agree with the petition signers? No.