Magandang hapon amiga! Good afternoon amiga.
I think I read somewhere, perhaps a posting by joebloggs (apologies if I'm wrong Joe), that £3,000 should be enough. Unfortunately, the Embassy and Visa Office dont seem to publish data on how much is expected to be in the bank so assumptions have to be made on the basis of how much was in the bank prior to previously successful visa applications.
I think the key thing is that the evidence provided illustrates that the income of your hubby exceeds his outgoings and can support you also without recourse to public funds.
I think it is also important to explain with evidence that unusually high amounts of money have been spent visiting you, organising the wedding etc. I think you can explain this all in a supporting letter.
Good luck amiga.