Maybe not 100 offers per day, but 5 low ball offers per week is not unreasonable if you're closing 10-15 deals per year with them. 

I am debating between offering my ideal offer right off the bat, then if they decline/counter with something unreasonable, I will walk away.  

Even if they do not you may have legal recourse on the premise they are being unreasonable withholding release of the requirement.

Sounds like you were the one who was unreasonable in this situation.

If you are doing all the work, but they are putting in all the cash, I'd say something like 60/40 or 70/30 isn't unreasonable.If there's a property manager, and all you are doing is picking out the places, and maybe making some quick phone calls, I'd say 80/20 or even 90/10 isn't unreasonable.

I don't think 8-12% is unreasonable. 

It took a total of 24 days to get this system fixed, and in my opinion that is totally unreasonable.  

Finally, asking for copies of a landlord's notices to tenants, without a search warrant and without a good cause to believe a crime has been committed, violates the privacy rights of owners under the Fourth Amendment of the Bill of Rights, which guarantees that: "The right of the people to be secure in their persons, houses,papers, and effects, against unreasonable searches and seizures, shall not be violated, and no [search] warrants shall issue, but upon probable cause, supported by oath or affirmation, and particularly describing the place to be searched, and the persons or things to be seized."

Investors see properties priced at unreasonable levels.

$7500 seems a little on the high side (but not unreasonable) for two complete units (inside and out).