I can't tell you what thrust is best for your boat. Each trolling manufacturer has a formula for telling you what thrust to get for your length and weight. Mine is 130 lb thrust with a 108" shaft. It is powered by 3 65 amp hour lithium iron phosphate batteries rigged into boat's house side with a switch that converts the bank from series to parallel for either charging or discharging. I can sit in a very strong current for a little over two hours without moving a foot. I've sat on Sablefish spots for over 4 hours in the ocean and not run out of power but getting close.
There are a lot of factors that go into installing one of these systems. Between batteries, trolling motor, type of control, type of charge system, where to mount, etc. I have a few videos on youtube under my name you can check out as well. Installation isn't for the faint of heart. Easy, but takes about 30-40 hours for a whole system, depending on many factors.