Built-in Roth components, spousal contributions, and an additional tax exemption also apply to the Solo 401k.

A first time homebuyer will qualify for a homeowner exemption to bring down their taxes. 

The Realist.com data states this; Total Tax, Less Exemptions, Plus Relevy$5,683Annual Tax$7,228I'll do a little more digging on that.

Are some LLCs exempt from submitting this info?

Not because the agreements should be available and are not, but all syndications are exempt offerings under various SEC rules.  

Obviously, their capital gains are well beyond the $500k primary residence exemption. 

It is supposd to catch money laundering, but it exempts any company with more than 20 employees and grossing more than $5 Million. 

You can lookup the tax rate on the county assessor website - Make sure you are looking at or calculating the property tax WITHOUT any exemptions (since you’ll not get any as an investor). 

Ignorance of lead paint presence doesn’t exempt you—you must have a compliance letter to avoid strict liability.If you rent to a couple or a single woman and she becomes pregnant, the law requires you to delead the unit.

Also, if you pay your parents any profit for the property, if it is their primary residence, I believe that a married couple has up to $500,000 exemption on profit from a primary residence, I'm not 100% sure on that, but you can search for that pretty quick.If you are looking for any loans, please let me know.