I drew that on SketchUp. I can sketch the rest of the table if you like. Give me a few minutes. Right now it looks like this:
Table Leg Joint [3] 2-21-16.jpg
There are options. If it were me, I would make the half-laps on the table saw, and cut the mortises into the center stretcher first, before glue-up, then use the mortises in that piece to lay out the mortises for the bottom foot. I'd probably cut them all while everything was still in individual parts, to make it easier to handle (and to fit into a mortise if that's the method---or fit into a vise if mortising by hand)