Financial requirement for Family Visitor

Hi Dear Members,
I am living in the UK on ILR since 6 years and working full time with the same firm since 5 years.
I want to sponsor my real brother for family visit visa to UK who will stay for couple of weeks and will go back to his home country. my brother is working there at local shop and gets his wages in hand. He is not running any bank account there in his home country. He is married man and have 5 kids.

I have following queries in this matter.

1. As He himself has nothing in his bank account, the wages he earns spends on his family, So can I sponsor his visit by providing my personal bank details, pay slips etc? and by mentioning in sponsorship letter that I being his real brother will bear all the expenditures of his visit?

2. If the answer "yes" for the above query then how much minimum money I should have in my personal account?

3. what other documents must I provide along with the bank statements, pay slips, accommodation proof?

Thanks for reading the post and would be grateful for professional help.

can any one help me out regarding above matter please?
Thanks

Looks like no one is interested to help me out, please can anybody advise me on this matter.
Thanks