You are operating as a sole proprietor.  

I will keep you guys posted and give you an update when I revisit this.I never thought of running a sole proprietor business as a house flipper.

I visited an area of Omaha that is being “revitalized” and spoke with a local proprietor who shared current happenings as well as some rumblings of future endeavors.

I am a sole proprietor with a handful of properties.

We are relatively new to the real estate investing business, have two properties, both sole-proprietor owned (no LLC) with maximal insurance.

@James McGovernTo tag onto @Cara Powers post...Remeber single member LLC’s are disregarded entities so they file like sole proprietor...For flipping, mainly the expenses go towards your cost basis.

When using my social for the sole proprietor it had my name incorrectly inputted in the online form (which you cannot change) so I had to go in person.  

An email just went out to everyone who applied that the advance is based on $1000/employee and I assume that sole proprietors/ single-member LLCs would be considered one employee. 

Lastly, since you mentioned one of the borrowers is an LLC, you should note the following exception to the 1098 form: "You need not file Form 1098 for interest received from a corporation, partnership, trust, estate, association, or company (other than a sole proprietor) even if an individual is a coborrower and all the trustees, beneficiaries, partners, members, or shareholders of the payer of record are individuals."

In regards to having a business he can be a sole proprietor and file under his social security number on the W-9 (In MO) without a legal entity however you need prove that he has a legitimate business.