Any advice for a newbie starting out RAI in a pricy market?

[Ashlie Z.]

I want to diversify my investment portfolio to include some RAI besides stocks and ETFs. I have lived in San Diego 10+ years. I want to start from where I am familiar with. I am thinking about investing a 3b2.5b SFH in areas such as Oceanside, San Marcos, or Chula Vista which are relatively less pricier comparing with 92130 or 92129 (where I am living now). Any advice or comments?