A good real estate agent who works exclusively (or almost exclusively) with investors and is not squeamish about presenting "investor" offers, which may range from all cash to very creative :-)2.

HOWEVER There is a small tax payer exclusion that allows deduction of up to $25,000 annually of losses if you're under a certain AGI. 

In the sale of a REO in the mls, not on an auction site, yes owner occupants have an exclusive period in many/most cases.

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@Caleb DrydenYou missed the window of being able to sell the home and avoid some or all of the gain via section 121 exclusion if you live in the home for 2 out of the last 5 years.

My question is, are there any rules preventing me from working exclusively with investors?

California isn't the problem here.OP will want to consider his IRC Sec 121 exclusion, and all capitalization to basis over the years to mitigate the tax exposure.To everyone suggesting an IRC Sec 1031 exchange: You can't 1031 business rental real estate into a personal residence.... 

Currently I have 1 property in my name exclusively, from before marriage and then we bought a property together as joint tenants and are both registered on MTG. 

@Sylvia B. you need to file a quiet title action and have the Court declare that you are the lawful owner of the property to the exclusion of all others.

This is exclusively for land deals (vacant land properties).