Look guys, I don’t want to determent your desire to succeed in this market. I was just like you 10 years ago. The truth is, not much changed since then. There are new cool tech out there but most of it is irrelevant to actual business. If you want to build a shiny cool looking real-time applications, don’t look for architects or real-estate developers. Look for advertisement agencies, for whom your application would be a part of the package deal instead of the core delivery. This is where you going to have time and budget necessary to deliver something of higher value then standard visualization. As soon as possible join a studio or a team of similar minded people, you won’t be competitive if you keep working as a freelancer and you need to both specialize and generalize at the same time. There are few things which require extra attention in real-time applications - GUI and sound. Such expertize is non existent in archiviz firms but usually available to marketing and advertizement agencies.