V-20 Steplift

I am new here. Looking to buy a boat in the next couple of years. I want to know more about the steplift and this seemed like the place for that. I will use it with the family on the ocean and lakes. For fishing and skiing. So here it goes..

How long have they been made?

Are they good on the ocean?

Are they a good all around use type boat?

What engine/outdrive combo would you recommend (i/o..o/b..HP..etc.)

Are parts hard to get?

What kind of maintenance does it need? (For an average grease monkey)

What size and model does it come in?

I know it is alot of questions for a newbie but I like to research very well before I buy. Thanks for all the help.
Oh yeah I live in Ventura Ca. 8)