You have to expand your services to include animation, motion graphics, modeling, graphic design, etc. To get anywhere you have to have the abilities as a visual effects artist capable of working in the Game, Movie, or Architectural industries. Limiting services to Architectural is very narrow - Architects pay nothing 3D services because their fees are so limited.
The money is going to be in Advertising and Marketing - go to developers and people who need help with product marketing.
The only hope of staying with the ArchViz industry is if Oculus VR takes-off. Then there will be the need for people good in UE.