I’ll second some of the thoughts already shared – I was looking for an all manual for my 17′ Lund Fisherman to save money and weight as well. Found a deal on a used Yamaha 9.9 with power trim. Having had a manual on for a while previously, I would never hesitate going power trim and electric start. I even planned on taking mine off when not using it early on…. just cause my boat is already slow, and weight matters. Took it off once for pulling tubers… besides that, it is on always.
Unlike a manual trim – it is rock solid in heavy waves for traveling. Trim is nice even when trolling. Mine is an older carb model – so push button starting is great. Resale is there – just all the reasons if possible to stretch to the power/electric model.
A 8 or 9hp high trust kicker can but pretty impressive at moving a wide boat in rough water or in current. I had a 6hp on for a while – and even that was enough.