Who's going to give some company their money, then wait 2+ months for the product?
Worked for a fella 1 time that was doing window replacements. He'd go out, sell the job, people would hand him a check IN FULL.
Then he would order the windows to be made.
Nice way of starting a biz with other people's money without taking loans.
BTW....he did go bankrupt and clients were just out the cash!! So were us installers.