LG95172:
I've been active in real estate investing for a decade now. What's going on is a little more complicated that what you've described. "Lender's" are split up into groups. The lenders who fall into the Freddie Mac category have the limit of (4) one to four unit properties financed. To my knowledge, Fannie Mae is still at 10 loans. I hear that's supposed to change to match Freddie Mac's 4 loan limit in January.
Things are not looking good for investors because a few who have abused the system have ruined it for the rest of us who own property management companies and have done nothing to fraudulently inflate the value of homes on the market.
For in depth information, you should go to Freddie Mac's and Fannie Mae's web sites. If your mortgage broker is a good one, he/she will do this reading for you and will already have these answers (assuming he/she works with investors regularly).
Kind regards.