No, Piper and the cockatiels do not get along for the most part; I have to constantly keep an eye on them when they have out of cage time together, and Piper normally chases the cockatiels which causes them stress, so most of the time I need to give them separate playtimes. Lovebirds are known to be aggressive, especially toward other birds not of the same species (and sometimes even to other lovebirds as well). You should never have a lovebird and cockatiel in the same cage. I recommend not getting a cockatiel at this point, but adopting a second lovebird if you really have the time and capability to handle double the bird commitment. Also, I highly recommend having your current bird meet the new lovebird first prior to adopting, to ensure that they will get along and like each other.
Regarding work – I used to work a job which required me to be away from home for 12 hours a day, sometimes more. I did this for years, and during that time, I did not have any birds. I managed to transition to work that, while still full time and is the sole way I support myself and the birds, it allows me to do some work from home and therefore allows me to spend many hours daily with the birds. Only then did I bring birds into my home. I know many people say it can be done or do it, but working long hours away from home and having birds is not a great idea because it simply isn’t the best for the birds to be inside the cage for most of the day. They need many hours of interaction and time together as a flock with you.
So, for those of you who are considering adopting a first bird or additional bird, I highly do not recommend bringing a bird into your home if your work requires you to be away from home for more than 4-5 hours daily on average. If you make the commitment to adopt a bird, you need to be there for him or her. If you can’t be home for as many hours but still want to (and are able to) care for an animal friend, I recommend adopting other animals in need instead of birds. All animals deserve consideration and care, and way too many are being given away and abandoned after being purchased on a whim by people who didn’t think it through or research. Animals are here with us, not for us.