I think 20 days is unreasonable and unlikely the law.

Where I have seen it fail is putting lipstick on a pig then attempting to sell it at an unreasonable price. 

With 2-4 units, if you don't have a huge portfolio or if you have a good PM it isn't unreasonable to have a tenant lined up to move in the day after your existing tenant moves out.PM: Instead of using a market standard like 10%, I'd get with a PM company and have them estimate a property that is similar to what you are looking to buy.

If you know how to operate in them, they are actually fair.  10% per year is not an unreasonable amount of rental increase without having to pay fees or relocation costs.

The second part of this is, for the $ we are shelling out, I need more focus on my business (I dont think this is an unreasonable request) Should I just have an honest conversation with my agent and tell her that I don't think she is focused enough on areas that we need?

Depending on the size of the job $50 a day isn't unreasonable.

Why did you close after that unreasonable act by the seller?   

Again, his price is totally unreasonable, considering the location & condition. 

Are there other creative tips or contingencies (or lack thereof) that you find increase the chances while that won’t impose an unreasonable level of risk?

The requests seemed unreasonable to me, however I do not know if cancellation of the lease signing violates fair housing act in any way.