You got me worried. I can't find anything to support this. Everything I find that limits write off's to $10,000 refers to personal homes. Rental property and businesses don't adhere to this limitation.
Read page 89 of this PDF or page 87 of the original document, lines 15-20. It basically says that this limitation does not apply if you are carrying on a trade or business (doesn't exclude sole proprietors).
http://apps.washingtonpost.com/g/documents/business/read-the-full-gop-tax-bill/2678/
I also looked at the website for TurboTax by Intuit. They say that property tax for rentals and business are an "expense" and not a "deduction" and there will be no changes for what you enter for 2018.