Need a 4K forklift with a Rt. angle stacking aisle width of less than 7.5' w/o forks. Salesman indicated that electric forklift is not good for multiple trips up ramps as the ramps eat up power. Also had some concerns with stability of 3 wheel forklift on the ramp. Thinking of going with a short toyota 4k LP forklift which would minimize battery maintenance concerns. Lithion ion battery powered are to expensive. Any thoughts or recommendations.