Father assisting one son financially
Q: Should a parent be equal to all of their children in terms of finance and gifts?
For example: There are 4 brothers. No. 1 is a doctor, set up by the father but paid back. No. 2 is in the business with his father as a partner, also paid back. No. 3 is still studying. No. 4 is an aalim and recently started working in the business. The father wants to set no. 4 up eventually.
Question: Will it be fair if the father sets up no. 4 in the business, without paying back. Basically giving him a business and not giving any other brother the same.