With a fixed current output source like a LM317 or one of its lower drop out cousins working as an accurate 1 amp constant current source making measurements down to .0001 ohms with a simple digital meter IC would not be hard at all....<snip>
Even with a 5% deviation accuracy measuring that low is more than enough for anyone under typical use applications.
Just something to think about. And like I said earlier it could be built for around $30. I had lab fees far greater than that in my college lab classes and typically got nothing to take home with me when the semester was over.