I would talk to a lawyer who is an expert in business asset management. Why not create several LLC's to segregate functions & risk including having one on the shelf ready to go just in case? You don't want a lawsuit, tax lien, UCC claim or any other dispute to slow or shut you down. You and your partner could even pay each other. If you form them properly you can switch cash flow to another LLC immediately without customers having to change the name on the checks.