you may have seen here on this great forum that, a spouse visa was issued in one day!
same for fiancee visa.
Cost wise, I think it's much cheaper to marry in the Phil, not just because of the Wedding but, the cost of spouse visa here in UK. Refer to other threads on the cost and the visa websites.
For my wife and I, we wanted to marry in the Philippines, the obvious reasons being, so all her family could attend....It is, after all the biggest day of her life and mine!
We both wanted to commit ''big time'' so what better than marry there. No option of a quickie divorce unlike in the west.
Good luck and keep us posted