Maple trees in our yard

A few days ago my husband marked the trees he intends to tap. So far, he has chosen four. Four trees?  I am no expert on sugaring but doesn't it take gallons of sap to make enough for one pancake breakfast.  Now would be a good time to mention that my husband does not like pancakes.  I stopped giggling long enough to ask he where he intents to keep said gallons of sap.  To that he answered that he had not figured that out yet but it was no big deal he said he was thinking about some type of vat outside.  At this point I was seeing dollar signs.  I wonder how much investment we will make in the sugaring process.