i think you need more information before you start doing that kind of stuff. I recommend taking lisa vander’s real estate investment workshop (www.pacblueinvestments.com). She also has a radio show on AM 1700 on Thursdays, 8:00a.m. to 9:00a.m. If you call up on a Thursday and tell them that you heard about the workshop on AM 1700, they will give you a discount so that the workshop will cost $299 (i think) vs. $599.
With $600-$700k worth of equity, you can probably buy about $3.0 million worth of investment properties around the country, but you should really take the class and they will show you how to do it.
If you are interested, pacblue investments will have a free teleconference with lisa vander this wednesday at 12:00p.m. Call 858-704-0462 to register.
I was in the same boat as you a few years ago. I took the class and learned a lot. I wish I had taken it sooner, then I wouldn’t have had to make to many mistakes to learn from.