My dog likes a lot of space to circle. Do you recommend buying two Standard Porch Potties and combine them?

You can absolutely do this. We have had customers who have had great success with 2 large potties side by side. As each dog is unique, if your pup needs some more space to do their business then this is a great solution. The only caveat is you do need to keep the drainage systems separate unless you can find a plumber to connect the lines together.