Hibiscus pro here guys. I always use a large pot and had one I kept alive for several years by bringing inside and setting in front of a window. Kept it watered and fed and it would bloom pretty much yr round.
Also, they do love their water, as Dobbs pointed out, but they are also resilient in that if you do leave for a week and don't have Dobbs kick ass irrigation set up, they will look super shitty. However, you can just water them well for the next week and they will be right back to looking like nothing bad ever happened to them.
Lately, we have stopped bringing them in during the winter. A couple years ago, we didn't just bring in the plant, we brought in a bunch of ants that decided during the summer the pot was a cozy place to make a super-planet-earth-destroying-sized-monster-nest that took a strong Schendel effort to get rid of.
I really like Hibiscus and have been getting Hula Girl Hibiscus the last several times we buy them.