Any GT car will be challenging if not impossible to get within your purchasing timeframe but YMMV depending on what market you’re in.
Are you looking for a custom build? Are you set on wanting a gt car? Your comparison set of cars is all over the place - what is the main use case for the car - just for fun driving? Comfortable for long rides? Track time?
The standard 80” is $4k. I was expecting maybe $10-15k with the changes but haven’t asked for a quote yet.