Fixing to buy a bow mounted TM and was wondering what are the advanteges of 24v system over a 12 v. I would think a longer run time but a disadvantge is buying two batteries. All my other boats came with trolling motors so I haven't had to shop for one. Any advice on brands and and models would be appreciated. 17.5 fiberglass center console that weighs about 1750lbs. Thanks guys!