Should I buy a guitar?

My friend is offering me their guitar and I'm not sure if I should buy it. I'm thinking that spending money on a guitar isn't practical since I'll only be able to play it for a month before I head out of town for college. Meaning, it'll take a few years for me to play with it again (after I graduate) as carrying the guitar with me on the way there isn't feasible due to additional luggage. HOWEVER I've always wanted to have a guitar and she's selling it to me with a huge discount since it has been already used for years, as well as adding other stuff like a capo and strings. I have the budget to buy it but I'm in a dilemma if I should go for it or not. As much as I love playing, it'll be only for a short moment.