Is there anyone knowledgeable in these areas who could offer assistance?

I am going for a house hack with Fannie & Freddie conventional , After my 4th offer was rejected going over listing I asked the listing agent for some additional info and they stated that for this property there were 42 showings within 4 days. 1 cash offer, 1 commercial, 15 conventional and one FHA with 9 waived inspections, 11 escalation clauses and 5 appraisal gaps.

How can I verify the Opex of the property prior to submitting an offer?

Until you have a proper valuation for raw land you cannot make an offer.

We typically offer cash for keys first.

@Kyle Hendricks You say you are a lender, is that a traditional bank lender, or do you offer private lending?

Their job is to answer your questions, consult with a professional (broker, attorney, title company) when you don't know what, who or how to ask :) The central and south coast does offer quite a bit fewer hurdles to permit, more on that later... 

Despite offering above the asking price, I'm consistently missing out on potential deals.

Ironically, the offers we had from private entities to purchase the property were approximately $200k less than the final price.Why was this the case?

Owners mistakenly ASSUME all PMCs offer the exact SAME SERVICES and PERFORM those services EXACTLY THE SAME WAY, so price is the only differentiator – so, they often select the first PMC they call or that calls them back!