The key to purchasing a home is usually based on cost and the amount of money one can borrow, but, I would be happy to help you find a home based on the entire central coast and a home with a granny unit as well. However, without all of the information it would be a shot in the dark choosing a home for you.
You can look on my web site to help narrow down your search at http://www.dnorwood.com/Pages/Home_Search_Mulipal_Listings_M
and view all of the homes that fit your criteria. You will need a home on acres, as duplex or a very large lot in order to accommodate a main house and a granny or 2nd home. Homes on acres can be found in Paso Robles, Templeton, Atascadero, San Luis Obispo, Arroyo Grande and Nipomo, but there are also homes with two units on smaller lots. So, clearly you question needs a little tweaking.
You can also give me a call or email me and I will be happy to send you a portal MLS link that specifically fits you criteria based on price, location, lot, size, and of course property with two homes.. Also, I have a listing in Morro Bay at 465 Oahu St. that is a single family / duplex with two homes for $499K.
You can call me now at 805-471-0828 or email me you criteria at David@Dnorwood.com and I will get you the information right away.
David Norwood-Central Coast Real Estate