Filing an "exemption" of your securities with the SEC does not amount to the same level of regulation as in other areas of the investing universe. 

And, then what happens if I buy that tax certificate for 2008 but it's 2017 and all the taxes after 2008 have been paid or are now exempt.

Fannie explicitly allows transfers to LLCs when the loan originated after June 2016 and when the LLC is controlled by the original borrower (source: Fannie Mae Servicing Guide - D1-4.1-02, Allowable Exemptions Due to the Type of Transfer).

I BELIEVE @Dave Foster said there was an exemption for community property states.

landlords would be exempted from the ban if they provide a reason for excluding pets from their property, such as concerns over health or nuisances, so long as they can provide documentation to a rent board if a tenant pushes back."

Are low rises exempt from the requirement?

@Brandon SmithYou likely won't be able to keep the homestead exemption once you turn it into a rental.

Move in to it and fix it up and stay there for 2 years to be tax exempt.

The folks I work with operate under the SEC exemption (I think Reg D 506b but I don't have it front of me) that allows up to 35 non-accredited investors, as long as they are sophisticated and have a pre-existing relationship with the sponsor.

Also note, the military and all government employees on assignment are usually exempt from occupancy taxes if they can present you with an exemption certificate.