Sounds like maybe some fun, working with dad, but probably not worth it. If you guys have the wherewithal to build your own, you ought to be able to design it too. It should custom fit the spot you put it in and have just the perfect number of drawers and cubby holes for your rig. Otherwise, take a look at the cheapy Bush and Sauder stuff. Use one of their designs, but with better quality wood.
I saw some wonderful (but cheap) desk setups at Sears for dirt cheap. Like $150 to $250 for perfect little work centers. And if you're doing a corner unit, that's super for my next suggestion. Make the right return the part where you use the mouse. Make it lower than the main desk. About keyboard height. That way your elbow can rest on that while you use the mouse. The most ergonomic setup ever!
To me, it's not worth building furniture. By the time you buy the material, you'll be at 1/3 the cost of a finished piece. Then the time it takes to build it plus sanding it to perfection so that the finish will be nice. Just hardly worth it. And if you blow it on the finish you're screwed. You can buy real furniture quality desks for about $1,000. Won't be custom, but it will be worth keeping for decades, if not generations.
We were quoted about $1,000 for this
Double Pedestal Flat Top Desk for example. There is a "Computer Armoire" in the background too. How much do you think it would cost you to build an equivalent unit? These are all cherry with a decent dark semi-gloss finish.
"Crafted of select black cherry veneers and cabinetmaker hardwood solids for enduring value." And that's just one outfit. Do you realize how many furniture manufacturers there are out there? Hundreds! Believe me, the unit you want to build is already done somewhere out there for about 30% more than you can do it yourself. And for 60% more you could get real furniture!
Good Luck!