And if you're a sole proprietor DBA they'll let you link the accounts so you can transfer money bank and forth as needed.Would not recommend online only. 

I already have a solo 401k that I set up years ago as a sole proprietor with an EIN number.  

@Kyle SpearinIf you haven't set up a business through your state corporation commission, you are a sole proprietor.  

The owner of the property is basically a sole proprietor, renting his personal property. 

I am looking to wholesaling real estate and setting up a sole proprietorship.  What is the best type of liability insurance for that? Who offers that type of insurance?

Will you be the proprietor who brews coffee and wipes tables?

The bank is telling me that any purchases of 4 units or less will be treated sole-proprietor with the benefits of any regular consumer mortgage including 3% downpayment and lower interest rates. 

You may have to register the LLC as a "foreign entity".If the LLC only has one member (or a husband/wife in a community property state) and has chosen to be taxed as a sole proprietor then you're in luck. 

Sole proprietors can represent themselves. 

It can also be difficult to get financing in an LLC and credit while it is easy as a sole proprietor to get more mortgages, etc.