The price range on coaches vary a lot. It just depends on what you need and expect and what you are willing to spend. I'm not big on coaches but they def9ntely have their place in competing
Single digits probably but you shouldn't get wrapped up in numbers and focus on what you see. At the end of the day nobody on the street knows your bodyfat percent and neither do you. But they do know what you look like
Ypur diet looks decent to me. While on tren ypunisially want carbs a bit higher as it will burn through a lot of carbs. I'd raise carb count to maybe 300g per day and have fats at 75g