Hello Everyone

The situation is as follows,i am a govt servant earning 20k per month.
and im planning to visit UK for a week as for tourism and also to meet my son.
i have hotel papers invitation from them.
as in they mentioning the stay, and the expenses
I have the following docs:

1. Leave sanction letter from my employer
2. Bank Statements of around 350000 recently which is transferred by a relative in dec 2010,who is not of any close relation.
3. Salary Slips(5 months)
4. IT returns/form 16(recent 3 yrs)
5. completed applcation form
6. form fees paid
7. A valid passport with at least 6 months validity remaining
8. Employment Letter / Confirmation of Employment

I just want to know 3 things.
1)i have a son living in uk,i have mentioned in the form that im also meeting him. but he is not sponsoring my expenses. do i need a letter from him that i am also coming to visit him apart from tourism?
2) my daughter is paying for my expenses,which i have mentioned in the form, who lives in india with me do i need a letter from her too that she will be paying for my expenses, her bank statements too or whatsoever.
do they see the proof in the bank statements that my daughter has transferred the cash or not or someone else?
3)i have a property, my owned flat. do i also need to provide the papers of it along with all the other documents? or is it ok if i dont?

i am only providing the originals and not the xerox copies of the documents, should i provide the photo copies too along with originals?