How about spending $100 bucks on an 18 volt cordless circular saw? Then you can have the yard load full sheets and make cuts as you unload at home. AAMOF, in these cordless eelctric days, few people appreciate anymore how quickly and easily a really good $20 buck carpenters hand saw can cut through a 4' panel. Stanley Sharktooth in several sizes, highly recommended. Mine is 20 years old and will go through a sheet of MDF in about 11 strokes.