[intakexhaust]

Doing a large lot of them with a circular saw would be a helluva workout. I usually do it that way but never in such a large quantity. Perhaps hire some younggun to do it. Some might like the lighter weight circ saws (including myself) but for slogging thru two by's I use the Skil worm drives. First do a quick scrape of mud, crud removal. Not much to do about the ones with concrete spillage.

BTW: 6" carbide blades are dirt cheap. Anytime I see them on clearance, I stock up. Name brands - often priced under a buck each. Same for 10" carbide. I consider them all disposable and toss them out when done. It would be foolish to waste a Forrest blade on any rough task.

If doing the rough stuff like that task, use a beater table saw. I wouldn't like that crud scraping a smooth aluminum tablesaw used for other ripping or trim work. Make a sled out of MDF with a pre-set angle.

As for a portable jobsite tablesaw, I use a Craftsman with extended outboard feed and both left and right side table pull-outs. Trick is to have light enough in weight for portability, in/out truck, moving about multi-story houses. That rules out cast iron tables. It has a far better fence and miter guide than some others. Under the plastic main housing, I reinforced it with MDF. Made my own inserts for zero clearance and dado work.

The entire saw is now mounted on a heavier gauge all steel collapsible stand with large diameter wheels and a dump bag. A quality but now discontinued item from Rigid.

Rated at 3 hp. One negative is the arbor bearings are somewhat lower quality.