I've always banged on about the sensibility of having a back-up aircraft if flying commercially. I have two and I see two as the minimum requirement. I'll be wrapping my business up in November...just not enough steady work at realistic £ rates anymore, but I'll still keep the two aircraft just in case I plunge back into the game again.With all due respect, Mamarz...
You are losing money because you do not have a backup craft.
If nothing else, a “bind and fly” hull-only kit should still be available (without controller) allowing you to continue to fly and complete your jobs while your first craft is being evaluated and/or repaired. This is assuming you do not need to send the controller along with the failing H.
In situations where your controller is not available or is part of the problem, your business model needs to accommodate with a backup controller as well.
You will find plenty of references to the above, as far as advice for commercial operations.
Just trying to help.