I'm planning on buying a cat as soon as I save enough money.
Why do you want to buy a cat?
I think it's a good idea. I have always wanted a cat
I think it's very responsible of you to make sure you have enough money before buying a cat. Pets can be expensive, and you should only get one if you can afford to take care of it.
I can't wait to get my cat.
You will make an excellent cat owner and I am sure you'll find one that is perfect for you. Enjoy your cat and I wish you both the best.