Here's how I think about it: To get rough lumber "foursquare," you face joint, edge joint, plane, and then rip. Three of those four operations are done with a jointer/planer, whereas a table saw can only do one of them. I'm a huge proponent of Sawstop technology (10 fingers is a good number), but in your case it seems better to start with a good quality J/P combo machine.
Good luck