Taking a week off? Unless your home resembles a jungle, you don’t necessarily need to have someone come by to water your houseplants. Instead load up your bathtub, and let the plants water themselves while you’re away.
Simply, line the tub (or your sink if you only have a few small plants) with a towel, close the drain, and fill the tub or sink with a couple of inches of water. Then just leave them to soak up what they need while you’re away.