I own a 24" leigh jig, and it gets used from time to time for one off projects.
To be honest, I wouldn't want to use it to make a kitchen full of drawers.
My solution to the dilemma of building drawers in house, is that I run blind dado drawer boxes on the CNC, from baltic birch plywood. I feel that these are stronger than a lot of inexpensive dovetail drawers. They have a simple look, and are functional. Thats what most of my customers want.
If a customer wants to pay for dovetailed drawers, I will simply outsource them. There are plenty of shops who can crank out dovetail drawers cheaper, and faster than you ever could, and they are probably going to be more consistent, and of higher quality. Sometimes you have to let the drawer guys, do the drawer building.
Quite frankly though. I have seen a lot of poorly built dovetail drawers in inexpensive cabinetry fall apart. Dovetails are associated with craftsmanship more than anything, but this isn't always the case. People like to hear the word dovetail, but i have learned that its a type of joinery that can be highly overrated. They have their place, on museum quality furniture, and high end cabinetry but they are not always needed. I am saying this as someone who has cut them by hand.