I found a rotary cutter at Grissly for 3.99. My dh goes there to get his wood shop tools and supplies.
They don't have replacement blades but the HF ones fit.
I found 4 in wood clamps at HF that I use to clamp quilt layers to edge of table when I am getting it basted to quilt.
I also use metal clamps that are made to hold a picnic table cloth down at w.mart
small prescription bottles work well for my bobbins.