years ago I had a freshman student that set out 1000 orange seeds in a seed bed (I don't remember if they were sour orange or grapefruit), transplanted to oil cans (told you it was years ago) after they sprouted, year 2 budded them to several different varieties, year 3 transplanted them to "egg cans" slightly smaller than a 5 gal bucket...fertilized/oil spray, set up sprinkler system, repeated new batch each year...sold them at 4 years at $6 - $8 each... paid for his 4 year education at the Univ of Fla...

I had class that painted street addresses on curbside for prom money..

aluminum can recycling

regards Les