I struggled with this question for a while before we bought our current more expensive primary residence. My conclusion is that it may not be a great investment, but nonetheless still an investment. We have more than a dozen rental properties free and clear, which generates more than $14000 gross rental income per month. My husband and I also work full-time. Before we bought our current primary residence, our living expense was less than $4000 per month. But my thinking was with all the money saved, we still need to invest somewhere, be it stocks or more rental properties.
The home price has inceased a lot these days that it is not easy to find a good rental property any more. But we could still land a decent primary residence with very low interest rate. I think the low interest rate is what makes this primary residence a little more like investment. Besides raising my kids in a nice neighborhood is more important than buying one more rental property. I plan to sell this property eventfully when my kids go to college, and then we move into one of our rental properties. Since this property is located at a prime location, I do think the value of the house will be very stable, if not increase. When that happened, we could almost think we have lived in this house rent free. I have considered quitting my full-time job for a while because I could not stand my new boss. But this mortgage is what moviates me to try even harder. Now I views this job as an challenge to overcome.