I considered this as well Casper.
I think the main concern is whether you intend for the tap to run through your bar top. If so you will need to make sure the tap on the kegerator can disconnect and reattach to the bar top or if you will need to purchase a tap tower. You will also have to make sure it will fit underneath your bar, but I think an average size kegerator would (don’t hold me to that).
When I compared purchasing a kegerator to building the keg box in these plans, the latter was much cheaper. Unfortunately, I did this after the bar was complete and was forced to build my keg box without plans, just an idea of how it would work and a lot of great stuff spray foam. The end result was a success, but I wish I would have just followed the plans from the start.
And you can easily insert a keg box in the L-shaped bar plans. I would just incorporate the straight bar with a keg box into one leg of the L-shaped plan.
I realize I’m throwing a lot of info out there and hope I’m not making this any more confusing than it needs to be.
Good luck.