Hi! 
I'm Japanese, and here question is my first time. 
So my sentence might have a little mistakes, please pardon me. 
  
I plan to develop game with unity, blender, but didn't find software to design interior in Japan. 
When i find Home Designer Software, i feel to find the right software for myself. 
But before i buy this software, i have a few questions about software. 
  
One is to export whether or not other 3d format, and another is difference of fellow products. 
I will buy " Home Designer Professional" of $509.95, but there is another type software "Chief Architect Premier" over $1500.00. 
I want to understand difference between the two software. 
  
Another questions is to export whether or not export other 3d format from &510 version. 
I plan to create game, so i need to export 3d format that blender and unity can import. 
I know specially to export whether .3ds or .obj. 
  
I'm sorry for making to read a long sentence. 
I'm very fine to get reply! 
Thank you!