I'm planning to purchase the 15 foot version of the pontoon boat shown here Pro-Tatch.com. It is a little 5 x 15 foot, 4 pontoon boat. My wife and I mainly fish on fairly shallow, local, big ponds / small lakes (3 - 20 acres). We might infrequently go out on a local lake that is around 1,800 acres. We mainly fish for bluegill and bass. I would appreciate recommendations for the following...

Fishfinder: I don't want to have to spend days figuring it out or tuning it. Shallow water performance (in 3 feet of water) around the boat is VERY important as I'll almost always be in water from 1 foot to 20 feet deep and don't really have any need to see what is more than 30 feet deep (especially in ponds not that deep!). I don't anticipate that the GPS features would be of much use to me either as it'll mainly be used on small waters that I know well. I'd like to spend $500 or less; but could go a bit higher if performance warranted. Any recommendations?

Trolling motor: I'd like the maximum feasible thrust on a single 12 volt battery. A 42" shaft is long enough. I'd like bow mount. Thinking either foot pedal or remote. Not sure. Not sure if there is a choice. I'd like to keep cost to $1,000 or less. Any recommendations?

12 V Battery: Any recommendations? Are the Optimas worth the price difference?

Thanks in advance for any advice!