Hello buddy, I'm from Mexico.Here are some things that you must consider:The underground canalization, I mean the pipeline. Will you do it yourself?I mean will you dig the 60 meters and place the pipes?Also do you have to buy the materials or your client already bought it and you only have to install it?The work can be made at any hour? Do you need some extra tools and equipment?It is necesary that you consider all the details to offer a good price to realize a good job.