Bullet head i have an older 5m freedom Sport with the 90 Yam 2 stroke.
1st up i think they make a excellent fishing boat, benefits similar to a centre console but family friendly.
The Yam 90 is a good solid motor IMO not overly thirsty, but a bit lazy. Just to check if the dealer is on his toes ask/look what prop pitch it has, in my experience they generally sell them with 17” which is too big but saves them the cost of re propping.
Ross is correct they will want to be giving you the motor dirt cheap; “dirty” 2 strokes are not the way to setup a new boat, it will limit resale as well. I know the 75hp etec is a large capacity but I would be looking at the 90hp etec for the 490 Quintrex.
Rgds
Jim