If you are building with concrete I would pay close attention to a few things. Insulation, concrete is shit by itself. Airflow, normal wood houses use the tiny gaps and seams and shit to help draw air through the house all over, a concrete home doesn't and you should make sure you have proper ventilation throughout the house or it will be damp and musty and grow mold. Plumbing and wiring, if you don't have tubes plumbed before you pour you have to build essentially an entire wooden house on the inside to hide the wires and water lines and drywall it all over, near doubling your costs. Foundation, a concrete house needs a more substantial foundation, and if anything settles out of plumb and square later, you can't do anything about it, unlike a wooden home that can be jacked up.

Also, make sure you verify you can get utilities to your house. Just because everyone around you has water and power and internet hookups, doesn't mean they will hook you up, or not charge you a literal fortune to do it. And don't fuck around with permits and shit, they will fuck you if they can.