While landlords are often exempt from these disclosures.

Did your primary become rent controlled and if not what exempted it from rent control?  

The Taxable Value is uncapped and equated to the SEV upon a sale or other transfer of property ownership, with limited exceptions.Homestead versus Non-Homestead Millage RatesCounties & cities in Michigan are allowed to set their own millage rates, with one restriction – a primary residence (Homestead) is exempt from up to 18 mills of school taxes on their Homestead property.

If no consideration is being exchanged, then all you would need is exempt stamps for State and county. 

We also have a big demand for traveling medical professionals, etc.

PA used to not exempt from state tax. 

You can look into the ATI exemption, but I dont know if it applies to vacation homes.

After their $500K exemption, they still owed $6M.

For example, areas like Chicago have a strong demand for furnsihed rentals, especially in neighborhoods near medical centers.

In most states there is protection in your primary home through the homestead exemption, your investment properties must be in a separate entity.