There is no substitute for Quality. The difference in printing cost between a $46 spool and a $25 spool is negligible. The real cost in 3d Printing is Printer time. An 8 hour print that fails because of inferior filament will eliminate all your profit when you have to reprint an object in order to satisfy a customer. A print job that uses 3 meters of filament costs about 72 cents more to print with High Quality. Do you want to jeopardized a 3 to 7 hour print over 72 cents?