Soft floor....well....rotten floor.

[nobitchin]

I am about to inheret 23' 1974 seacraft. It was an I/O but has been converted to an bracketed outboard (225 Yamaha 1995). My father and I rebuilt it in 94/95 (I was 14 yrs old) to make a long story short, I love this boat. Dad is great, he just doesn't have the time to use it. So he gave it to me. Gotta love Dad.
I know there are 3 or 4 spots all on the deck that if I tried I could put my foot through it. The rest is soft, besides a few places. No damage on the casting platform. So my question is, what is the ballpark price range I should expect if I were to get the whole deck replaced at a boat shop. Not the dealer. I would be able to paint it though. I've done that before. Any information would really help.
thanks
Scott