Thanks for your summary. Just did a little more research. It seems the benefits of those agency loans are:
1. lower interest rates compared to regular commercial loans----is that still possible to get one agency loan with rate lower than 4% now?
2. can do the loan 15 or 30-years fixed, instead of 5 or 7-years fixed for regular commercial loans.
3. lower downpay requirement
4. non-recourse
Cons:
1. loan cost is high (5-7%). more paper work.
2. prepayment penalty is high---either could be yield maintenance (that penalty is a lot as JY mentioned) or step-down prepayment penalty (like 5-4-3-2-1).