Real Estate Salesman who is a sole proprietor (ss #) Schedule C filer has a Simple IRA that he and the business contributes to. Started another business this year flipping homes, dealer not investor and sole proprietor under his ss#. Therefore, will have two Schedule C businesses on 2017 return. Any issues with setting up and contributing to a SEP in 2017 for the flipping business, to maximize retirement contributions, Simple with one Schedule C business and SEP for the other Schedule C business.