@Naina Tara,
The answer is yes and no:-) As my own circumstances have changed, my thought process has changed as well.
For the yes answer, when I first started working and decided to buy a home in the San Jose area, my goal was to buy as much house as my money would allow. Historically, this area has had a supply demand imbalance and with the continued tech concentration, I don't see that diminishing anytime soon. Over the past decade or so, as I have been able to move up to buy a larger house to support the growing family and then buy a house at the right school district, I continued to hold on to my older houses and renting them out. The name of the game here is capital appreciation.
That brings me to the No part of the answer. If I am looking for cash flow, buying a multi-family is far superior to the rents I get on my single family homes. The name of the game in this approach is cash flow. In the past 4 years, I have bought multi-family apartments and find that the cash flow there is great, and in this environment (not typical), the appreciation was good too.
And now to do both (Yes and No); If I was in your shoes trying to decide what to do, I would focus on finding myself a place to live in that I could call my own. I would pick as much house as possible in the best school district (even with no kids), to ensure that demand for my house would stay high if I sold. If the market continues to grow in the next year or so, I would either refi or take a line of credit from that house and buy investment property.
Hope this helps. Good luck on your decision.