You would have to explain to us what its actually doing, not that its just running rough. With more information, people here might have ran into the problem before and be able to address it. Ive ruined two clutches before, and each time there were different warning signs. So just give us more info on what its actually doing because theres a lot that it could be doing. Also about changing it and cost. If you do it yourself which isnt too hard it would cost you a ton less. That way you can actually spend more on the clutch for a nice one. I dont know if you could really pull it off in a day or not... I could. But like I said I've done it twice... You would be able too if you knew what you were doing and researched it before trying.