Who says clients don't pay for modeling?
I'm working on a project now that an architect known for doing residential design was hired to design the project. Guess what software he uses to draw with. Does he provide any modeling services? No. The contractor who is doing the remodeling project is a design build contractor. Guess what software he uses. The client knows that the contractor models all of his projects. So the contractor has been hired to do the building and do the modeling of the project that the architect is designing. This is where I come in I'm doing all of the modeling. My point is, there is a market for modeling and the market is getting bigger every day.:)