We explored this in detail and with three attorneys and two CPAs. Decided against doing it for several reasons. First, the LLC does not protect your assets from an aggressive litigation. This is a myth. The attorneys make a lot of money on setting up these LLCs, work that is typically turned over to a paralegal. The LLC has no assets, therefore, litigators will go after the officers of the LLC. That would be you and any other partners in your real estate interest. The LLC is little more than a speedbump, if that, we were told by an attorney that had no personal gain in the advice he gave us. Another attorney told us, "There's not reason not to do it." (????)
The separate tax return is a pain. However, if you want to finance your house as a second home rather than as an investment property, having the separate tax filing can come in handy. Some people take advantage of a financing mechanism that approves the mortgage strictly on the basis of a very high credit rating, in order to avoid presenting an income statement on the property. You don't have to file any income statements whatsoever.
When you finance or refinance, lending institutions will not finance to an LLC, only to individuals. You have to flip the property in and out of title every time there is some form of financing mechanism invoked. Expensive, time consuming, and mistakes can be made every time the disposition of the property changes (see below).
Many of us have all real property held in a family trust. If you finance (or refinance), the property has to be removed from the trust and then returned to the trust after your closing. This requires work from our CA attorney and requires the efforts of a FL attorney, where the property is located, as well. It gets expensive and tiresome. Once, our CA attorney failed to return the property to the trust and that was really complicated to rectify, because several months passed with us assuming the law firm had taken care of this. Not so bad if everything is being handled in the same state and with the same attorney.
The only thing worse than needing an attorney is needing two of them on the same matter and at the same time.