Don't listen to them. I am sure that your English is much better than their Turkish.
If you can't afford to use several guitars, then tune to the lowest you will play and simply transpose the chord progressions to the right frets for the other stuff. You can also use a capo. Some guitarists think it is "cheating," but it is far from it. The capo (especially on acoustic or clean guitar sound) can give you an extra finger and therefore more technique for a song that you couldn't accomplish otherwise without growing another finger.
Bryant