Campana Factory

Hi! I’m Michael, I started working with Blender and I’m new here.

I started modeling Campana Factory and I have modeled Tower so far. I encountered some topology problems (egde loops after extrude - now I know that I have have to be careful with it in the future) so from modeling cube based tower I changed approach to multilevel planes based tower. Actually 1st quarter consist of corner planes and then add mirror X & Y axis modifier and then join all into 1 object.
In screen there is turn of mirror modifier on 1 level of brick wall. Can be it left that way (multiple plane object)?