1. Since it is a building consisting a house and few commercial tenements there is no necessity to form an AOA or CHS.
You can demarcate the shop properly so that you can sell it independently after separating the same from the main building by mutating it
2. The eligibility for the loan to the shopkeeper will be decided by the lender.
3. If the shop is transferred to the buyer by executing a registered sale deed, then what is the necessity for any deemed conveyance deed.
4. If the shop is sold to him by a registered sale deed, then the buyer can very well enter his name in the revenue records including the index II