Well if your passion is Marine Aquariums then it is. You cant have a day off for Christmas, or take a weekend off. Fish have to eat and if a system has a pump go out you can loose 10k in a few hours. Employees are the main issue fish guys and fish girls are hard to find. I had one reliable employee in the 5 years, heck even caught a Mormon girl stealing coral.
In hind site I would have opened an Asian Massage parlor cause that sells itself and you just gotta go pick up money.....