Before I would have a professional have at it, you can make some easy inspections yourself. First and I'm sure you have, inspect your filter material in the return air. Could be clogged or if torn/missing, the evaporator(cold coil) could be dirty not letting good airflow through. Next, I'd check the rooftop condenser coil. Could have bent fins that need straightened(from hail damage). This would affect your performance out of your A/C. If you're in the extreme heat like we are in the midwest, get a fan to supplement & keep the air moving near the floor. When it gets over 95 degrees, a single A/C in a trailer can't keep up when your parked in the open sun. Go swimming! Good luck.
2006 Rockwood 8272S
2005 Chevrolet Silverado
John & Pandra
1st International F.R.O.G. Rally Branson Missouri