One might wonder what was the point of Lucas buying so many properties, but it was quite simple; to throw off investigators.
The Branch Manager skill allowed Lucas to own and manage branches of the Seven Sparks Forge store. In order for a building to be classified as a store, it has to be owned by Lucas and he had to agree to this change.
Thanks to the modern advancements in society and technology, it was easy to buy a plot for land miles away. Even on Earth, this wasn't a challenge, but in Eretre, it was much faster and easier to do so. Typically, a transaction would not even exceed four hours.
At the moment though, the Branch Manager system skill was still limited and Lucas could only manage two stores at the same time. So, why did he buy many?