Can I take money from my brother and not return?

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Hi Experts,

I am new to U.S. as well as Real Estate (moved from India to U.S. last
year). I live in PA with my wife and son. I am buying a house in
Pittsburgh, PA. My brother is staying in MN (Minnesotta) and he will continue to stay in MN.

My objective: Take money from my brother for downpayment and monthly installment (for next 5-6 years) so that I end up paying less interest on my mortgage? In-turn I am ready to have my brother 50% ownership in my house by putting him on title.

Please review the following and help me out:

1. I do not save much; so my brother has agreed to pay 50% of my home
costs (50% in downpayment and 50% of the monthly mortgage/loan payment).

2. We have two joint bank accounts (one with me as the first account holder and my brother as second holder; second with my brother as first
account holder and myself as second holder). I deposit my salary in the
account where I am first holder and my brother deposits his salary in the
account where he is first holder.

3. Togather we want to pay off the loan ($200,000) within 6 years span by
making $2500 each ($2500 I will pay and $2500 my brother will pay) per
month. I will pay $2500 from the account where I am first holder and he
will pay $2500 where he is the first holder.

4. Do I need to put my brother on the mortgage loan application? If I do
so; will my house in Pittsburgh be considered as an Investment property
since my brother will not be living here?

5. I want to include my brother on the title as well. I guess this way he
will have ownership on the house and I will not need to pay him back the
amount (downpayment + monthly installment) that he will be putting in my house. Also I want to add my wife on the title. I want to say in title
that A) My brother owns 50% of my house and B) Me-my wife togather own 50% of my house. How can I title my house?

Thanks in advance,
Roma