If I could discover a nitch I would pick my salary say 70K a year (might be difficult since its more local) Use your point of salary that the customer can bear maybee I am wrong and its $80K. Divide by twelve, add in all of your expenses for a month thus multiply by twelve, divide by 52 and than by the or five or how many everdays a week your customer needs remember overtime for saturdays etc..
Your truck costs are yours no matter what and if your customer wants a strong committment your gona be renting a Ryder when yours is getting a PM. Congrats on the nitch please bragg as when I retire this is what I want to do NITCH work....
If you are depenable, have deep enough pockets to get you thru, truck is clean and presentable, you carry yourself professionaly. Than what ever you do CHARGE them, most likely they cannot find all of those qualities above even if the customer purchased their own truck.