Yes, you can give the two flats on rent and claim deduction in respect of interest paid in respect of the home loans on the two flats in your return of income.
You will have to conduct a thorouh due diligence of the title of the developer and thereafter apply for loan from any bank offering the best rate of interest for such transaction.
Moratorium could be offered to a borrower, however it is subject to the papers and the relationship the borrower normally shares with the lending institution. There are multiple factors that decide the term of moratorium offered by a bank