Ow much should I charge per acer if am 12 and have a completely legal company with insurance
A completely legal company, with insurance, at 12? That's quite an accomplishment.
Don't charge per acre, give a price for the lawn based on your costs of doing business. There are too many variables to price by acre.
gas money+your work+how much yard it is. what my buddys uncle does is he walks the property and he counts his steps. then multiplies them together to get the square steppage as he calls it. i think he charges a dollar a step or something like that.
Square steppage? Wow. First time I've ever heard of that, but if it works, good for him.
I walk the property, estimating how long each section will take to mow. Add them up, and give a price. Never tell the customer how long it's going to take, just give them the price.