Optimize/compress large FBX files

I have some 3d models(homes) designed in 3ds max and exported in FBX. The FBX files sizes range from 300mb to almost 1GB for some of them. Looking to optimize them to make them smaller so that I can use in mobile apps. Need to reduce the final file size but maintain quality. I have seen some people compress files to under 10mb and still maintain quality.

Will start with 1 model first.