While this thread deals with the subject of tuning, might I mention the possibility of a reputable Guitar Educator? When teaching how to play the Guitar, I teach the how-to's of use & care of it also. In this day & age of battery powered tuners which are mostly easy to operate, even the very young students may learn rather quickly how to tune their Guitar. A good Music store should not only sell you one, but also show you how to operate it! After awhile, one should be able to "hear" how to tune the stringed instrument with another instrument giving you the basic "E" note, or by tuning the thing based on the overall sound which most of the strings make.
    If all else fails, one might put an ad in the personals looking for a Guitar playing friend of the opposite sex (or whatever floats one's boat) to meet you at a very public place to assist you in tuning your Guitar. How might they recognize you? Why, you'll be the one with the Guitar! This might be the best method of tuning yet!