You should have a broker open house with food and perhaps some prizes, but to win, each agent/broker MUST give you written feedback on why they believe the house isn't selling. 

WIN!

The fact that their letter to you asks for a mold inspection suggests to me that they have already become aware that mold can be used to leverage a legal case against you which stands to win them a considerable settlement from your insurance company.

I like knowing that after the lease is up, the tenant may buy it, which is good for me, and if they don't buy it, I get to keep the option money so I still win?

It's not impossible to win in this arena...but you've got your work cut out for you when relying on normal channels for acquisition capital.

Most other methods of investing require much more risk (putting up your own money or credit rating) and are unable to just walk away if the deal doesn't pan out so a greater percentage of people there are looking for win/win scenarios.

You can’t truly win in real estate investment (any property type) until you have an established acquisition pipeline.

Creating a win for a private lender will build trust and help increase your likelihood of getting another loan where you don't have your own cash in future.

House flippers are high stakes gamblers and winning and losing is just part of the game.

Raising that defense does not mean winning/loosing the argument.