Luis, cost is important but your application should dictate on wether or not you should use IC or electric. Electric in most cases runs cheaper than IC but if an electric truck can not perform the task in a productive manner you lose money in production. If you are in a factory where there is minimal ventalation an IC truck would not be my choice due to emisions as there will be employees complaing of the smell or headaches and etc.

So in a nutshell look at your application and make your descision on what would work the best and then look at a brand of forklift that is known for low cost per hour to operate. I know Toyota has a great electric sitdown and a lot of my customers are happy with them.