Wear on the very inside edge of the tread could be from the wheels being toed-out badly (but the other tire would then be wearing similarly), or from the wheel being badly de-cambered. That is, tilted inward at the top from a lousy strut installation or having gotten bent in hitting something - or from a wheel bearing that is really really bad. (Which means I think it would make noise). Be sure to check that the hub nut is tight and the lug nuts are snug.
If you can find a really flat parking lot, & close to level as possible, you could measure how close to vertical each front wheel/tire is. if you can figure a way to measure between the inner sidewalls of the tires, both in front of the axle, and behind the axle - the sidewalls should be the same distance apart. To do this you have to drive forward, and stop the car without having it roll back AT ALL.
The church parking lot near us is what i liked to use. It was really planar, and had a uniform tilt of 2 degrees. I used a carpernters square to find 'vertical', and a machinists protractor to measure the small angles. I had a good clean plank, uniformly straight, & 2 ft long, that i would hold against the side of the tire. Not a great alighnment, but it would show up problems the naked eye could not see.
Also, measure the distance from the exact center of the front/rear wheels on each side of the car. Do it carefully enough to be accurate to 1/16". This is how I check to see if a lower control arm has gotten bent (or a bushing is chewed up). This can happen anytime the car slides into a curb on a snowy road.