When your RV A/C won't start after a capacitor change, check for blown fuses, thermal switch reset, proper wiring connections, and overheated compressor lockout. The compressor may need time to cool down before restarting.
For your $500k-$1M budget and full-time living needs, a 2016-2017 Prevost or that 2016 Foretravel Realm K3 at $400k offer the best balance of reliability and value retention. The newer Foretravel K4s drive remarkably close to Prevost quality.
Both Tiffin and Newmar are premium quality. Tiffin known for exceptional customer service and lifetime structural warranty. Newmar often has more luxurious interiors. At this level, visit both and choose based on floor plan and personal preference.