You can get the toe pretty close yourself. In fact I have done my own many times and got 107k out of a set of tires once time when running OTR towing RVs so I must have had it pretty close. I do it a couple different ways depending on the type of tires and if I have a helper or not. If I have a helper, which is the most accurate way, I scribe both tires by first jacking the front end up and then clamping a piece of wood or metal to the control arms with something sharp on it to scribe with. Then with the scribe against the treads I spin the tires to get the marks, let it down and roll back and forth a little to get everything settled back to normal. Now is the part where you need the helper to hold the tape. I always burn and inch or two as this is more accurate than holding the tape end on the line. Measure front and back and try to get it as close to 0 as you can.
The other way I do it is to simply hook the tape on the tire treads if I have a tire with somewhat uniform edges of the tread lugs. This works okay but isn't as good really. In fact I just did an '05 this way today after doing ball joints and tie rods and then had the tow set at an alignment shop. I was within 1/16". The reason scribing is the best is that tires are not always exactly true all the way around, meaning they may wobble from side to side a little in the tread. Usually they are pretty straight though.
There are probably better methods but this is the quick way I do it.