
That giant dark red structure is a vehicle that makes up for the structure of my base.
Top left corner:
The crafting room where i have every single item within crafting range organized into categories. It also have virtually every crafting station and tool within crafting range as well. The center flood light surrounded by barrels has a bicycle pedals linked to alternators so I can craft and exercise to give power to my base if my 25 solar panels aren't recharging fast enough. It also the the control panel area so I can monitor my surrounding with the 8 cameras as well as the 8 avalanche turrets.
Top right corner. Where I store my rare items, artifacts, entertainment items, books, and survival gear. At the top right corner of that is my sleeping room. Bottom left are my 25 upgraded solar panels, each with a car, motorbike, and truck battery, along with a swappable battery and battery case. Finally it has a pair of 55 gal, one for clean water, and the other for dirty water.
Bottom. This is the farm area where I grow things. It also have a pair of fermenting vat and a quern. Finally the farm area is near the vicinity of a fridge so I can prolong the life of my harvest.
Top of my base. My garage where I go mad scientist with even more designs for vehicles. It is also where I dismantle any civilian and military vehicle I find and a place where I perform maintenance on the ones I have. It also houses my scavenger vehicles, one is a modified flatbed truck-turned survival armored van, and the other is literally a 3x3 square cargo space with wheels that I can pull when it is empty, or drive when it is not (it is too heavy to pull when full).