To get the owner occupied rate if the previous owner was a non owner occupant you actually need to submit an application along with multiple forms of proof of residency.

If the Realtor complains about the POF letter, tell them you know of investors who get these kinds of POF letters accepted by REO banks all the time and it's the Realtor's job to submit it and let the bank decide.The banks know this is a cash offer and that this proof of funds letter is for financing.

If the numbers don't work, continue to submit the same offer until he gives up after 6 months.

You should talk with a lender to get a pre-approval ASAP.A good pre-approval requires you to submit bank statements, W2s, tax returns and pay stubs.  

For water/sewer bills, I always submit a FOIA (Freedom of Information Request) to the city for current balances and last 12 months of bills.  

I feel like there is some sort of filing I would need to submit.

Some is also on MLS but you must submit offers through Xhome.

As work is completed, he submits a draw request with a list of items done and % complete. 

There is application submitted to excerise sale will the County give me this info?

As stated above, the realtors work for YOU and your offer is your choice and for them to submit.