Brazil golden visa through real estate

Wow -- this is an obscure one!  The instruction that makes it possible was only published on November 23, 2018.  It's the very LAST document in the "Resoluções -- CNIG" section of this list of applicable legislation on the Federal Police website, RN36/2018 -- CNIG:

http://www.pf.gov.br/servicos-pf/imigracao/legislacao

The Labor Ministry grants the visa, and there are no instructions (yet) on the Federal Police website, or any I could find on Consulate websites.  Any time you're dealing with Brazilian offices on this one, you'll want to have a copy of RN36/2018 with you, because it may be the first time they've seen it. 

According to the Resolution, it's pretty straightforward:  you provide the registered Purchase and Sale Agreement, a declaration from a Brazilian bank registered with the Central Bank (i.e., any major commercial bank) that the requisite funds have been transferred from abroad, and, if you're putting up new construction, your legally required building permits to the Labor Ministry.  After their review, they'll authorize you to live in Brazil for two years.  At the end of that period, you can apply to extend it indefinitely.

I'd definitely work with a lawyer on this, if I were doing it.  Good luck!