I had no issues with 30 min turnarounds
The impact of one engine taxi is very noticeable on brake temp, also on fuel and time savings, letting go of engineer sooner,
I always check which brake is hotter before i use the brakes and keep them equilized.
most literature points to brake fans being detrimental to brake wear, it is disconcerting to come to the ramp and everyone has those noisy fans on with passengers walking around. I only use them on taxi out.