B2 Visa for wife travelling together -USA

[mahes_waran]

Hi I'll be travelling in B1/B2 visa this month I already have a valid Visa, I'm planning to take my wife along with me in B2 Visa, We've booked an interview.She is working so she has applied leave and is waiting for letter from her company. Since I'll be sponsoring her I've my bank statements, tax filing statements, Payslip ready.
Also we've her payslips,form-16, bank statements.
Are there any other documents which we've to take along.Since we are planning to travel together
Do I need to write a Invite letter, Letter to Consulate,I-134 .
Since it is only 3 weeks maximum what other questions we've to prepare?

[immihelp]

No you don't need to write invitation letter and Form I-134.

Need to have your financial statment, her employer letter. Visa officer may ask where are you staying?

[mahes_waran]

No you don't need to write invitation letter and Form I-134.

Need to have your financial statment, her employer letter. Visa officer may ask where are you staying?

Thanks for the response.
We are going to stay in a hotel which will be paid by me which will be reimbursed upon my return.
Also what would be the minimum amount that is expected in bank account? Can we show the bank statement of shared account which has sufficient money that will cover hotel and other travel bills.