I think the Franky Family would help out with rebuilding Water 7 after the Aqua Laquna, along with rebuilding the Gallery-La HQ and then become shipwrights.
As for Water 7 and the possibility that the World Government would retaliate, I have this thought: Assuming that the rest of the Government got word what was going on with the Straw Hats fighting back and beating up an government organization along with the marines, which is very probable, it would be a unwise move to assault Water 7 for several reasons.
1. Gallery-La's deal with the World Government that Iceberg made. Breaking that would probably hurt them in the long run, economically and military strength speaking.
And 2. Arresting Paulie, Lulu, Tilestone, or Iceberg would also be a bad move because then CP9 would be mentioned and it's not supposed to exist, though the government could deny it like any real government. There's also the sheer support from the citizens of Water 7, they were ready to burn the Straw Hats at the stake for being prime suspects in attacking Iceberg and the chance that they will fight back when either word that the government attacked Iceberg and Gallery-La reaches to the citizens or if Icebergs and the shipwright heads are under arrest.