Well you don't need to run off and get an expensive jig to cut tenons. You can do it by hand or with your tablesaw or bandsaw.
Without knowing what toys you have in the shop at this point, I'll explain how I do the tenon part of this joint with the bandsaw/tablesaw when I am cutting lots of tenons the same size.
1. I set up a fence with a stop for depth and cut one side then the other. If your wood stiles/rails are the same thickness, the tenons will be very close to uniform.
2. Set up your crosscut sled on the TS and put a block of wood to get the tenon to size. A little bit of experimenting here.
3. I love to cut my tenons with my japanese saw with just scribe lines. With all the joinery I do with the handsaw this is really just following the line and fitting with a rasp.
4. One closing note:
ALWAYS CHOP OR DRILL THE MORTISES FIRST.
I have never owned a biscuit tool or a domino cutter so I have cut my share of M/T joints. If you are only going to cut a half dozen joints maybe this would be the way to go?
Mortises chopped with a mortise chisel. This is 5/16 I think.
I have 24 tenons and 24 bridal joints precut in the shop for drawer dividers. I just grab them and fit with no glue to allow for movement.
2 tables: one built with hand tools and one with the bandsaw.
You can see the dividers in use here(3ea) They have been faced with walnut strips in the front and await a little dye work.