Student or Learner
I appreciate your assistance. Thank you so very much for taking out your precious time to help us. Surely, I know that you are busy and helpless, but you are the only person I rely on doing such a job. Again, thanks.
Can I use what I wrote here as a thanking message?
Pope of the Dictionary.com Forum
I find "your precious time" to be over the top.
Thank you so much for taking the time to help us. I know you have a lot on your own plate, but you are one person I trust to do a job like this. I truly appreciate your assistance.
I'm not a teacher, but I write for a living. Please don't ask me about 2nd conditionals, but I'm a safe bet for what reads well in (American) English.
I'm not a teacher nor a native speaker.
If you mean "not able to do anything without help" then I can't figure out what you try to say.
"You're busy and helpless" doesn't make any sense for me.
Please, correct all my mistakes. I should know English perfectly and if you show me my mistakes I will achieve my dream a little bit faster. A lot of thanks.
Not a teacher nor a native speaker.
If someone was truly helpless, I would not want them to take time out of their day to help me. It sounds to me as if their "help" would probably cause more work than it saved.
Remember - if you don't use correct capitalisation, punctuation and spacing, anything you write will be incorrect.
"Helpless" implies a sort of pitiable condition. Someone who literally can not do anything without someone to help them.
I think you are trying to say that the person is really busy and does not have any assistants or colleagues to help him.
This is quite different from saying that someone is "helpless."