I went throught that a few years ago and here is some thoughts:
my mccauley was not "overhaul able". Ask if it can just be resealed instead. This is like meet new spec vs meet passing specs.
Eventually , I resealed it and it worked great for many years. The only thing that bothered me was knowing that I had a prop that was not "overhaul able" . But no leak and again worked great.
A few years later , I installed a new 2 blade top prop. To be honest , I did it for 3 small reasons:
1) knowing my prop was not overhaul able 2) ramp appeal of the scimitar prop , 3) get rid of the yellow arc on my tach
Cost was much lower than what you are quoting. It is heavier , but I also changed the starter to a lightweight so it was almost a wash from a Weigth standpoint
Not happy with the prop initially as it let to a lots of vibrations at certain rpm 23-2400 range.
These seem to be going away, either because I am used to it or more likely because the counterweights in the engine re find their equilibrium.my engine is passed TBO.
Hope this helps .