I suppose we all need to determine how long it takes us to go through a 4 oz bottle of a CLP product and how much we like storing a gallon of HAZMAT in our garage.
I suppose if I were the maintenance officer for a department, and had to clean everybody's gun once a week, a gallon of Ed's Red would probably be pretty handy. However, as a solo shooter with a handful of guns, a 4 oz bottle, of a less-toxic product, that comes packaged in a handy container, with a pointy tip, is a whole lot better choice for me.
In reference to cost, sure a pre-packaged bottle of CLP is going to cost more than most home made concoctions, but in the big picture of guns and shooting, a bottle of store bought CLP, even the most expensive brand, is nearly an invisible cost, compared to the guns themselves, ammo, range fees, targets, travel, match fees, etc.