Build portfolio from one property?

[Jason Rowlett]

Hello! I am a new investor in Austin, Texas, with an occupied condo in California. I currently work as a field sales rep and would like to keep my personal income separate from the income I make on my rental. My condo is currently worth $300k (I bought it for $200k two years ago and now owe $132k). It rents for $1600/mo with $1370/mo expenses, profiting $230/mo.

How do I start from here to build a portfolio of properties? How can I leverage the condo as a separate enterprise to invest in more real estate? Should I take an equity line and reinvest that way?

Thank you!

JD