Of course the dealership would answer your inquiry about bottom paint, ask him how much and you'll know why he answered.
Talk to a few neighbors and find what paint works in your area then paint it yourself.
I got the boat a couple of years ago and spent most of last summer replacing old parts. This summer I've been able to use the boat some but I find there's always something needs fixing..
Here's what one of mine looked like after about 25 years in what I think was fresh water tho who knows with a used boat. The other side was even worse...(a replacement on the right)
Probably not, the upkeep on a boat especially the boat your wanting is more than a millionaire can cough up. No matter what size it is they all are a hole in the water and gobble up the coin.. but it's always nice to dream...
The mercrusier manual #14 is for the alpha 1 gen 2 which is probably what you have. It covers the outdrive. There's a lot of rubber bits that go bad over time..
Get a hold of a oem manual so you can get familiar with what you're dealing with. Depending on previous maintenance you could be in need of some new parts. Prevention is a good thing.