In the P&S contracts that I'm familiar with there is a requirement for EM to be delivered within 24 hours of mutual agreement. 

If that's the case, it looks like you're starting up a real estate investment firm, my friend.

My top contractor bidding right now is the one who hasn't been able to get engineering firms to sign off on another similar project.  

How can I be apart of this and what firms would you recommend to receive the best knowledge and friendly training? 

Get references and call em.

your remedies are your EM.. if they will sign the cancellation..regardless I would certainly take the 10 minutes to file the complaint this is bad business.

They have wasted time and money and need to start over with a professional or abandon the concept entirely.When you work with a professional firm that specializes in this area, you will generally get the plan setup as well as guidance bundled in with the service, which is why most providers charge more than the $51.25 fee involved with the state filing component you mention.If you were to have success establishing the structure and getting a custodian to accept your LLC documents, you would then need to find a knowledgeable attorney in this space and pay on the order of $400/hour for any questions you may have about IRS rules in the future.

And, a law firm in Florida has started a series of lawsuits targeting landlords/PM with these policies and have won substantial awards. 

Our company in NC offers commission structures depending on if they purchased the property through an agent of our firm and we offer a discount to Medical Personnel, First Responders, Teachers and Veterans. 

In Ontario when there are no more contingencies on an offer the deal is firm and considered done on the spot.