If she was already here and needed to leave early, I have that clearly outlined in the lease. 

This contract outlines the terms of the sale, such as the purchase price, any contingencies, and the closing date.Ensure the contract clearly specifies that it is assignable.

We clearly outline the early check-in and late check-out policies in the listing house rules and the automated messages we send out before check-in and before check-out.IF there is a violation we will send them a late check-out fee payment request.

Besides comprehensive lease agreements outlining the tenant’s property maintenance and damage prevention responsibilities, I am also thinking about signing with a tenant's additional agreement with all prices for typical damages which they need to sign with a lease.

@Mike Klarman  gives a good outline of how the big box companies use all these brokers you see on BP as there lending agents .  

New Servicer's Privacy Practices: The new servicer should also provide the borrower with their own privacy notice outlining how they collect, use, and share borrower information.

Should I have the agent send three separate offers, or is it more effective to choose one offer and include a letter that outlines the other options?

The groups that were founded in 2014-2017 have experience relative to those founded in 2021, but the syndicators that have been around since 1992 have EXPERIENCE.I think the three things you outline follow the same train of thought.  

They breached theirs in many ways and I have it outlined in great detail.

Here is an outline of my situation- I bought my 1st home in Queens, NY in 2020-My home is zoned for a legal 2 family and I have a copy of the Certificate of Occupancy.