I"m in the planning stages to make my new PM 3500 into a stealth camper in time for my retirement. I have several floorplans in mind, but I cannot proceed until I know where to place the four 300 amp AGM batteries. They could be series /parallel two each, side by side or all four in a row. They weigh 90 pounds each. Can I locate them next to the inside walls, or will I need to plan on a more central location, which of course takes up valuable space? I am concerned about 400 pounds of weight affecting steering and stability if the batteries are close to the wall. Can the PM's suspension handle the uneven payload?