I had a situation on my '15 taxes where I had some roll-over passive losses from rental properties that had been accruing for years and my CPA could finally apply them when I sold some rental properties.  

His loan balance with late fees, accrued interest, unpaid taxes/insurance, etc is probably near the original $210k.

Once a tax deed application has been filed, providing the property owner does not redeem the property which is now accruing at 18% per annum interest, the tax lien will be sold at a secondary auction as a tax deed. 

(This last question is more of a curiosity than a concern).Any advice on how to to find this information out myself would be helpful too (ie who to call, and how to get someone on the phone that will talk to me about this kind of stuff.

Out of curiosity, what's your plan that you + your lender + your agent came up with, for when it comes to light in a week or two (when the appraisal comes back documenting tenant occupied SFR, but you are applying for an owner occupant mortgage) and are asked how you plan to move in and owner occupy within 60 days of closing?

He was able to draw a 6% interest on his capital at any time or let it accrue. 

@Mike Fletcher just out of curiosity have you been to CA?

_________________________Out of curiosity, why are you selling?

_________________________Out of curiosity, why are you selling?

These include Acquisition loan interest payments, insurance, utilities, and negative cash flow accrued during the Rehab and seasoning periods.