They are not super expensive if you get the smaller ones. The single one is around $21, the R3 that I have is around $42. I got mine from Lee Valley. You can order them online nd depending on where you are in Canada you should get them resonably fast, most of my Lee Valley orders come in 2 days.
I wouldn't use pocket holes at all. Traditional joinery can be as fast, and will (if done properly) IMO be a better method of joinery. And, you don't have to buy a jig.
Starting with the base, instead of using pocket screws, prepare the joints for the legs and stretchers while they are apart, and while they are still square or rectangular, so they will sit flat when machining. I would use at a minimum a ½" dowel to be used like a loose tenon, with glue. Drill out the stretcher, and the leg. That happens where the red outline shows (typically) on the drawing.
The cabinet floor can be attached to the base by using screws from below the frame into the floor, typically, as shown with arrows in the drawing below. When used with glue, the legs and stretchers become more rigid.
Where the ends meet the floor a double rabbet can be used with glue. The joint looks like this.
For the top rail connecting the ends, a dowel can be used as done for the base. For the door, instead of pocket screws, the corners can be done with half laps, which IMO are stronger than M&T's, and a whole lot easier to do.
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