The gallons of purple power degreasers are around 8 dollars a gallon here. You can buy the 5 gallon bucket of same cleaner at the local parts store for 26 dollars.
I buy the one gallon garden sprayers and mix the cleaner in it. Works good for cleaning up saws, vehicle cleaning(tires, fenderwells, frame), mowers, tractors. Just replaced the garden sprayer this year. Got over 10 years on the original and can't tell you how many gallons meet thru it. I've always diluted with water depending on what is being decreased. The cleaner and sprayer have been a good investment.