Somewhat related.... this is a related case where the ruling is that a personal judgment can't be satisfied by the seizure and sale of defendant’s membership interests in a (one or more) LLC.

It was a meth lab seizure house, current owner knows that, doesn't look bad at all though (I checked it out yesterday.)

The government doesn't need to outright lay claim to properties; there are enough laws in place that they can make the general population think they own property when in reality they don't.In our current system of ownership rights, the government can:Seize private property whenever it wantsDictate how and what is built on each property (property owners need to ask for permission to improve their own property, and they have to PAY to ask for permission)Demand taxes based on a property value determined by the government and a mill rate determined by the government (under threat of seizure of said property if left unpaid)Demand fines if the property owner doesn't follow their guidelinesDemand rental and inspection feesAnd now, they can keep you from removing a renter who has broken an agreement with youAll the while, since we are led to believe we own the property, we spend our time and money in maintenance and repairs, maintain our own insurance, keep our properties looking pretty, etc.Property owners are basically tenants and we pay the government rent (property tax) every year. 

The brain seizure is that you're combining several things that don't really combine well.You've got the Primary/investment distinction down. 

For example, you don't want to have all your homes under one LLC because that opens up your portfolio to seizure if someone attempts to sue you.

For purposes of this division, a landlord has "actual knowledge of or has reasonable cause to believe" that a tenant, any person in the tenant's household, or any person on the premises with the consent of the tenant previously has or presently is engaged in a violation as described in this division if a search warrant was issued pursuant to Criminal Rule 41 or Chapter 2933. of the Revised Code; the affidavit presented to obtain the warrant named or described the tenant or person as the individual to be searched and particularly described the tenant's premises as the place to be searched, named or described one or more controlled substances to be searched for and seized, stated substantially the offense under Chapter 2925. or 3719. of the Revised Code or the substantially similar municipal ordinance that occurred in, is occurring in, or otherwise was or is connected with the tenant's premises, and states the factual basis for the affiant's belief that the controlled substances are located on the tenant's premises; the warrant was properly executed by a law enforcement officer and any controlled substance described in the affidavit was found by that officer during the search and seizure; and, subsequent to the search and seizure, the landlord was informed by that or another law enforcement officer of the fact that the tenant or person has or presently is engaged in a violation as described in this division and it occurred in, is occurring in, or otherwise was or is connected with the tenant's premises.

Maybe a seizure for drug selling or processing? 

No one has mentioned the obvious and that's the government seizure of every rental property in America with the CDC moratorium followed by state and local moratoriums. 

Every asset in that LLC is open to seizure.

You don't want to waste the few hundred before you have a closing in near sight, but once you do, I can't advise strongly enough against having many investments going at once in your personal name with all of your personal and business bank accounts, cars, homes, and all other personal and business assets subject to levy and seizure if something goes wrong at any one of those properties.