nice bar nook! – I’d suggest starting with a wall along the dotted line that would support the bar top, then a modular cabinet approach to the bartender side.
Take a look at the EHBP-08 and it’s construction and you’ll get what I mean.
I’m focusing on the EHBP-10 right now and that is exactly the approach you need here.
Build the wall
add the cabinets
place the countertop
If you can give me the length of those two lines and the correct angle (looks like 45 degrees to me), perhaps I can whip you up a basic drawing tomorrow.