What did their Fraud or Audit department tell you?  

This is a very important log but only to be used if asked (i.e. if audited).  

Don't want to pay tax on selling the rentals I unfortunately don't think they actually want to utilize the 121 to sell their existing primary and then potentially buy another one-it sounds like the goal is to ultimately continue owing that initial home which I think makes this whole plan 5x more likely to be torn apart under audit because they're trying to end up with the same property they started with.  

.: Hello,Did anyone received post closing audit from mortgage company.

I have been sued, investigated, audited and commended by judges.

Additionally, the study must be completed by “qualified individuals” and “professional firms” that are competent in construction, design, auditing and estimation procedures for building construction.So while a specific methodology isn’t required by the IRS, taxpayers must ensure that their depreciation deductions and classifications of property are substantiated with supporting evidence.

However, full site visits, though more expensive, maximize tax savings by capturing every depreciable asset and offer better audit protection.While online studies may be suitable for simpler properties, full site visits are ideal for complex or high-value properties.

This establishes the legitimacy of the arrangement and protects against audit risks.

These include drafting offering documents, adhering to ongoing disclosure rules, and audits, which can easily run tens or hundreds of thousands of dollars.

Already plenty of good advice above, but there's one piece that is missing.