For my traveling tool box, I went to Costco and bought a metric set of box end wrenches for less than 20 bucks. I then went and bought a normal size flexible head ratchet at the hardware store for less than 20 bucks and then I also got a stubby ratchet set at Costco for around 25 bucks. It had both metric and sae sockets, a stubby ratchet, a set of bits and a receiver. The stubby ratchet doesn't really work for big things but is a life saver for small areas. I just use the sockets that came with the stubby set on the normal size ratchet I bought at the hardware store. So total I'm talking about less than $65 bucks. I also put in some nitrile gloves, replacement bulbs, fuses and fuel filters. Really, it wasn't that expensive.

If you could afford snap-on tools certainly you could afford 65 bucks to have the right tools in your car.