That’s so detailed, I thought you just took a blender model 
this is so good! But this is going to lag a good bit!
Wont lag at all, it is very low poly in triangles, if I were to compare it to a roblox parts triangles, It would be one and a half spheres. Which means it will not lag at all.
No as in my own model, When I’m modelling i dont know the amounts of triangles my build has.