And as @Jacob James Caballero stated, California has very low CAP rates simply because the demand in the marketplace for these properties drives down this number.

After 30 days, a $500 cancellation fee will be assessed.

I also heard the city will be performing new tax assessments...is this true?

Generally speaking, do not rely on Assessor's cards for assessed values, drive by the property, bring certified funds in incremental cashier's checks (any left over funds takes 2+ weeks to get returned), remember to pay taxes during redemption period, check municipal liens (demo/repair), determine your exit strategies.

I purchased the CD from the Office of Property Assessment in my county.  

Really, you have 4 deals remaining on the table that represent 4 distinct analytic exercises, -Only Then- can they be considered in aggregate to assess/develop an overall strategy.Your question is really FAR more complicated than, how do I take advantage of the subsequent lien opportunities on top of the utility liens already purchased - either through loans, partnership or some other avenue.

What is a fair/good way to assess closing costs?

@Mark DresdnerHave you tried searching the marketplace as well?

I would aim to get the price at $225-230k as the assessment office current appraisal is 200k even though that is not a good value for multi family. 

In addition, the commission may assess costs and attorney fees against the unlicensed person found to have been engaged in real estate activity without a current license.C.