1. consider the fact that pets you choose should fit your living space.( although i don't know the meaning of living space)
2. also, you should be able to afford it.
3. finally, consider your health. you should be healthy enough to take care of your pet. it doesn't seem that your pet will have a happy life if your pet is left alone if you die sooner.
4. in my opinion, correct
Student or Learner