Figuring out what loan to go with... pmi or not pmi????

[Samuel Maclean]

So I have called all the banks and a few morgage brokers.
Goals
Own buy and hold real estate: multi families and (eventually)single families
two this year one in the spring and hopefully one in the late fall
I have up to 16000 down
Im looking for somthing under 180k
Plan is to to use as primary residence in first one then move to the next and claim the same.

I have found the following loans:
Credit union
Pros- offering 3.5% down they pay half of your closing costs 30 yr ARM 2% for 4 years then up to 7% over the following 3 years. No prepayment penalty, no PMI

Cons- only pre approved for a single or duplex 140k

Bank
Pros-offering 5% down seller can contribute 4% to closing costs 30 yr fixed at 4.5% no prepayment no PMI
Cons-only single or duplex have not figured out what i am pre approved for.

Morgage
Pros-FHA 3.5, normal interest rate 30 yr fixed up to 4 unit
Cons-PMI

Now the morgage broker told me i should go with as much units as possible and then go down in units until I am in a single family since I am planning to use them as primary residence that way if I buy a 3 unit and then say i want to get a two unit it looks like im upgrading to a more home(ish) place.

What other information would be helpful?