I've trained my own cat to do tricks as well as taken care of and trained my parent's dog who is 50 lbs. I've entertained, trained, and walked other people's dogs for them previously. I'm currently working from home part-time, so am available to check in on and walk dogs and cats at pretty much any time needed. I try to get out of the apartment at least once a day already, so a dog would fit right in. I have a cat in my home who is friendly to others and absolutely non-aggressive, but can also be safely put away in a bedroom if other pets aren't comfortable with cats. There is an inner garden within the apartment complex that is large enough to walk around without fear of running into the street, and there are also plenty of green gassy areas outside.