Just had an offer accepted on a 4 plex in Phoenix, AZ. 

Don't accept anything less than rent and late payment in full.

Their offer came in at $6k over the asking price, and I counter-offered with $5k more which they accepted. 

One of the top listing agents in my area told me she refuses to accept offers from Redfin because they use $35/hr zero commission "associate agents" to host inspections/appraisals, etc, rather than the actual deal-writing agent, causing the above to be the norm w/ Redfin rather than the exception. 

I've had about 3 inquiries asking if I accept Section 8.

A great buyers agent will be able to help you fine tune your strategy, highlight market trends, knows where and what to look for, hook you up with the best lenders, inspectors, contractors, etc, get you the full background on a property and the sellers, knows how a particular property compares to other deals and what a great deal looks like, identify untypical risks and knows what to look for before you waste time and money on an offer & homeinspection just to cancel the deal later, get the lowest possible offer accepted, oversee the transaction and handle all the paperwork, including title work and appraisal, knows how to approach a short sale differently from a REO, negotiate inspections and repairs successfully and help you make more money, safes you time and lower your risk every step of the way.Sounds like you signed with someone who provides value by knowing lockbox numbers?

Social media outlets are one of the strongest currently available, also check out big internet players like google.

No reason to ever socialize with tenants.

accept the proposaldecline the proposal but offer to pay for a patch repair on this part of the fencedecline and refuse to repair because there is the neighbor's fence that abuts so the yard is still completely containedother?

The listing says they accept CONV, FHA, VA loans, but because its zoned as mixed use, my understanding is highest and best use would require a commercial loan or something other than your standard residential loan.