I hope that it is still just an inner ear infection or something easy treatable.

Specialists are expensive, but sometimes not as much as you think. Personally I'd get it done as it may help him. It may also give you some information on what to expect in the future. If it is a neurological problem you may be dealing with other related problems in the future, like seizures, which is one of the most common symptoms/problems of a neurological problem. Getting some info on that before it starts sure would be helpful, especially if it is something that you can treat or control before they start.

What ever it may be we are here for you. We wish you the very best of luck.