Dual Purpose Battery vs 1 Crank and 1 Deep Cycle

[Cappy]

What 2 batteries give ya is redundancy. I have used my deep cycle to start my 90 and my cranking battery to run my trolling motor. If ya 25 starts easy and has a pull rope I wouldn't think twice and get one nice big deep cycle it will have plenty to start the 25 and the rope would be your back up when on the water ya dont want all ya eggs in one,,,,,er battery box.