Roman Colosseum 3D model

This is a great Colosseum model, exactly what I was looking for, I'm using this for a Rome map for a game called VRChat. This Colosseum has a very intricate design and it even has doorways that lead to halls, perfect in that regard, It'd be nice if there were textures included but I already have a bunch I can probably use. However there is one MASSIVE problem with this model. There's nothing wrong with the overall design, that part's great, but this model is made up of like 2000 separate meshes. When I imported the model into Blender my PC sounded like it was about to implode into a cosmic singularity made up of ones and zeros. And it's not like I can't just combine certain meshes, but they're pretty much all named "cube", "plane" or "cylinder" so it's incredibly difficult to combine the matching meshes. Overall 7/10