If you are thinking of becoming a vendor for this practice I would suggest you check around town. They dont like to pay contractors , service personnel and software vendors as well as hardware vendors, they want you to get the work done asap then will refuse to pay or fire you prior to job completion when there is very little left to do. I know of on instance in Ramseur where the contractor that started the building project and got the job almost completed and they fired him and then would not pay him and got someone else to finish the job, this saved the alot of money by not having to pay for the job in full just what it cost to finish. These are very crude business people with no morals. Just ask around and you will see.