diesel pickup truck that handles like a corvette and is somewhat inexpensive... Have you ever heard of the iron triangle in project managementIron Triangle.
The idea is that you have 3 constraints to any project; price, time, quality and you can pick 2. If you want good work done quickly it's going to be expensive; if you want quality work done cheaply its going to take a long time, etc.
lets assume that all of your needs weigh equally;
fun to drive
fuel effecient/low per mile costs
If you want to sacrifice on all 3 just a little bit, I would say that you should look at an older BMW x3, Audi Q50, Acura MDX, Porsche Macan (probably going to struggle to find one in your price point)
If you want to sacrifice load space for fun to drive and fuel effecient, I would recommend the VW GTI or VW Golf SportWagen (for less fun but more cargo space)
Lastly, if you can find one in your price point and fuel economy isn't the least important, the Ford Raptor pickup truck would be the pickup bed that can be sporty (in an off road manner of speaking)