Upvote:2
You should never try "manipulating" your account because the UK visa Offices can see right through that.
Instead, you should get a written, notarised and translated confirmation from your employer stating your position, your income, and the fact that you get it in cash.
I agree it seems very strange that you're spending 5.6 times your monthly income for a 25-day trip. You should definitely explain that to the visa Office, and also explain why your Hotel booking was cancelled, preferably with a notarised statement from your cousin.
And in the future: never modify any travel plans until you have the visa in your passport