Moving, going to need to build a garage

Balance your budget against your wants.

If I were doing it, I would consider what material to build with, in your climate condensation might be an issue. For example, a tin roof as opposed to wood/shingles etc.

Heat? Air conditioning? Bathroom/shower maybe? Lighting would be one item at the top of the list for me, type of lighting for good light and cost effective.

Lots of electrical outlets all around.