Hi,
I'm very interested in this project of yours. I have made FPS simple games before (in Unity), and wrote some CPP/D3D engines and games.
If you decide to pick me for this task, I promise to work very hard to finish it according to all your needs.
I promise constant communication, maximum effort and really good end result. I really like this project and I find it both challenging and motivating!
Users will be able to do walls, balconies, windows, doors, and etc. Image import will be enabled (for windows and similar things). Android Viewer will be able to walk through the created scene / house.
Thank you very much,
Goran