My Crosstrek is a 5-speed stick. All Subaru's with a stick-shift can be flat towed--all four wheels on the ground. That is per the owners manual, and also from my dealer who is one of the better and more knowledgable than the norm. A Subi with a stick can only be towed with four wheels down. It cannot be towed on a dolly with only two wheels down. All Subie's weather stick or auto, if they have to be towed with either the front end or rear end up, cannot be towet, they must be flat-bedded.
I do not know what has to be done to a Subi with an automatic tranny so it can be towed any distance. My owners manual says it ok to tow an auto only for a short distance and only at a very low speed.
In short, a stick shift Subi can be FLAT TOWED with no modifications, tranny in neutral and ignition on first click to unlock the steering. No limit as to speed or distance.
Just save yourself a lot of grief, worry, and headaches, and get a stick.
Grumpy