I'd like to point out that the issue is not necessarily time or sanity but money. Especially when adopting an adult cat, there will be incredible veterinary bills. Then consider food, litter, etc. another monthly bill of $100. Then there are the miscellaneous costs of toys and fixtures and grooming and pet sitting if you ever need to go away i.e. to a conference. I'm a doctoral student in a 6 year program and I can tell you that unless you have really rich parents or something, pets will be a hell of a budget drain.