Looks pretty amazing to me! But it’s not great as a selling point in a portfolio unless there’s some context. What is the intended use of this model? Is it meant for a real-time game level somewhere? Is it going to be part of a larger piece? Is the detail going to be lost once it’s all integrated and shown in context?
A tilable texture atlas with overlapping UVs would be the most efficient and impressive method to use with environment art - such as your building. The more assets that share the same texture the more a game engine (and your graphics card) will love you. It's not always necessary, but it's one of those things that doesn't…