Legally, you may run multiple businesses under one LLC; you also can separate them into different LLCs. It is your choice. There are pros and cons to each option:ONE LLC, PROS--less cost to set up; ability to flexibly redeploy money, assets, equipment, and personnel from one business to another.ONE LLC, CONS--if one business incurs substantial liability (e.g. from a loan or lawsuit), *all* the businesses will be affected--much more vulnerable. More complicated to spin off a business if, for example, you want to sell one of the several businesses to someone else.DIFFERENT LLCS, PROS--much more liability protection; easier to track the expenses and income of each business separately, since they are separate; easier to sell or shut down one business.DIFFERENT LLCS, CONS--can't use funds, equipment, staff, etc. from one business for another, at least not without more complexity, especially accounting complexity; initially more effort and cost to set up; have to be sure to keep all the different accounts straight.