Hi Kenny,
Welcome to the forum. I'd say £2500 to £3000 in the bank would be about right, but what they want to see is 6 months bank statements, with a healthy balance and 6 months proof of earnings. As long as your Mother owns the house and is prepared to put it in writing that she is happy for you both to live there you should be OK.
The rest of it is just down to proof of relationship, so you should keep everything, especially hotel bills and receipts from Phils. You should also make sure that you have the archive set in yahoo so that it saves all of your chats, then you can print some off and send them over to her when she's ready to make her application.
Iain.
