Realistic model in Blender to Gazebo

Hi.

I have tried to import Blender3d model to Gazebo (.dae) as a test following this video


however, each time I try the model either cut to half or very distorted. my questions are:
1- is it feasible to use Blender3d models? is there any other possible solution?
2- if I managed to create that model as a world, would it be possible to test quadrotor or any gazebo supported UAV to hover around that.
I desperately need your advice and thanks in advance.
ps: i have attached images of the model.