The other agents have given you good information about the availabilty of homes in Plano. The other factor is financing. If you have a mortgage on your home in California and you still own it when you buy in Plano you will have to have income and savings required to cover both loans.
I can give you the contact information of some great lenders in this area who can advise you. Once you know what you can buy I can assist you in looking for a home in the Plano area. I am sure we can find you a home.
If you would like to email me the criteria of what you are looking for I can email you the details of homes that are currently available that might work for you.