Most people don’t repair their own cars, so don’t think that’s what you have to do to save money. You can save some money that way, but at the cost of your personal time and a lot of hard, grubby work. Plus, there’s a pretty steep learning curve and tools cost curve. Folks who fix their own cars like to do it for the challenge, to learn about something new, and a change of pace from their daily desk work, it’s a hobby, that’s the main reason, not to save money. I’m not sure what the VW dealership shop did for $350, but even if all they did was change the front pads, that’s a fair price. You won’t be paying much less elsewhere. In general though imo you’re be better off $$$-wise if your car is old enough to be out of warranty to have your work done at an independent shop that specializes in VW or at least German cars rather than a dealership. May not be the case in all areas, but in most urban areas it is in my own experience. Adjust your budget to plan for around $100 per month on average in car repair and maintenance.
Here in Silicon Valley there are such services. The ones I’m familiar with don’t come to you home, but the come to your place of work. It’s usually arranged by your employer, and the employer lets you know when the repair guys are coming and you make an appointment with them, and they (try to) fix or do routine maintenance on your car in the parking lot while you do your own work inside the office. Some companies here pay part or all of the bill I think, as a benefit to their employees. Sort of like the free food and soda Silicon Valley benefit, only for cars. My suggestion wouldn’t be to use that sort of parking lot service for anything other than routine maintenance, like changing the oil, replacing the coolant, stuff like that. Leave the more complicated jobs to a well recommended repair shop having the necessary tools, equipment, and knowledge.