You can just buy one if that's all you can afford. But your ride could be come uneven and throw off the car's balance. Try looking for a used tire of your make that has some wear and tear. It will be cheaper and will be a closer match to your other tire.

They are easy to maintain if you want to put the work into it. You will need to make sure you keep the rims clean and use polish to keep them shining. You can use armor all for the tires and make sure the tire pressure remains at the right level to preserve the tires.

put a set of falken tires on my Dakota, purchased from a reputable tire outlet. I was skeptical of them because of the weak side wall, but coverage by a nationwide warranty quelled my fears. I had no problem with the tires, and they rode very well, only had one issue with a torn side wall, but it was because of an accident, and the warranty kicked in nicely. The were a nice, low cost alternative to the major brands for me.