(wink)As a sole proprietor or LLC, you are entitled by the law to claim a home office or any other expense as long as it is an ordinary and necessary business expense. 

Sole proprietor can do it themselves.  

He does his taxes as a sole proprietor (Schedule C) doing construction.

You can still expense  the real expenses related to the property/deal to the property to reduce your tax bill.Get your tax and asset protection advice from your own professional advisors, but generally speaking, you are doing business with an LLC, but effectively negating the LLC and doing things like a sole proprietor. 

I think they like the structure and tracking ability the single proprietor setup doesn't allow them, oh and the annual fees (More Grins).

I'll do my best to answer some of your questions:1) You still qualify for the 20% deduction (with the same limitations) as a sole proprietor or partnership or LLC.

Hello all,I am a sole proprietor a S-Corp and recently setup a Solo 401(k) plan with one of the Solo 401(k) plan providers.I am in the process of deciding to open up a brokerage account with Fidelity.I understand I need to complete the Fidelity Non-Prototype Retirement (NPR) account.I have few questions that I am hoping one of you who use the Fidelity Non-Prototype Retirement accounts can answer.In my example.

I know there are pros/cons of Sole proprietor/LLC/S -Corp, but for the purpose of this question - Can I rent my now secondary residence in town A to myself?

All of those firms serviced clients such as yourself with hands in many activities. 100% anectdote as there are certainly many small firms and sole proprietors that can do it well, but at least in my experience the regional firm is by far best equipped to service those types of clients. 

They are sole proprietors who think just signing up for a LLC means they are protected like a magic bubble.