Mars does not live in "meat space", he is a digital entity that live within the confines of the game, however he chooses to use his technomantic powers to form a small area outside the normal game boundaries, a great place to have some peace and quiet given that no one can get to it normally.
How the room or area looks generally depends on where he chooses to make this space as he may continue to move about but he will always attempt to make it an out of the way place with as few onlookers as possible and failing that some where that can be described as an absolute pain to get to. Places that have no interior area (frequently buildings) will instead have the empty space form an area similar to the stylings of his home game in the form of a workshop-laboratory hybrid.
Mars cares more for developing his powers rather than money yet he understand the value of having it and achieves both money and minor power development by enacting small, simple repairs and modifications to player equipment when needed, the price tends to be pretty cheap and the location varies greatly as does the quality of the work but not once has he destroyed an item yet. The entire transaction is always done through an opening that blocks direct line of sight of the players as he works.
His mechanical nature means his spendings tend to be extremely low, not needing most things, jury-rigging something or using his powers to get what he needs.
Mars has unintendedly set off to achieve the imposable ambition of total mastery over technomancy, his desire to explore the possibility of what it could do and how far he can push it drove him to break beyond his original programming. His discovery that he could manipulate the code around him was nothing more than a curiosity originally but after time and use found it to be a powerful aid and, apparently, completely unheard of. His exploits into its development has caused havoc in his origin game causing corrupted code and serious developer headaches, and yet he kept going, time and time again making progress and causing issues. While no one has been killed by him (directly) his willingness to use his power should not be ignored.
Mars' most defining event may have been eventually being made awake of both his sentience and new powers, inconsistency or rather, strange consistencies in his reality and the additional information made available to him made him aware of his own nature and that of his surroundings being able to see glimpse's to the code that made his world and the people in it, Now being able to see the code, glitches and errors.
Mars was able to make huge progress in learning about and developing his powers but sacrificed much of both power and what he leaned to escape potential...death?, re-enslavement? he's not sure.
Mars knows nothing about the dev team that made him other than they wanted him gone.