On my own things, i get permits for structural changes, even adding covered patios, etc. 

I know a lot of people just add an expense to the tenant's lease stating, for example, $30 added fee/month for water. 

$5k+ and 3 months added to your timeline. 

Added about 20000 to value of house Lessons learned?

As a licensed CA agent, the Seller probably has a duty to disclose that they are a licensed agent.You didn't know they were an agent when you submitted your offer, so you didn't include it in your offer.In their counteroffer, they are adding a disclosure into the agreement that they are an agent, as they are presumably required to do by the state of California.While I don't know the whole circumstances, nor am I licensed in California, that seems fairly normal to me.

It may sound nice to pay a 5% management fee but the extra fees can add up to be more than the other company that charges 10% with no add-on fees.

In return they would ask me….”Well what if I did this to the house and that to the house (spending thousands of dollars in extra’s to the house), how much could I get in rent then”, and it never ceased to amaze me, how they looked at me when I told them that they would still get $750.00 a month.

My ad is on Zillow, zumper, and Craigslist.

@Stephen Gonzalez  I always like to have some extra cash.

great advice, if you need extra support contact denise holliday and check out her website for AZ specific tenant notices and evictions - doctorevictor