@Amanda516 I doubt there are many hosts who use the services of an interior designer, but I may be totally wrong. What I do think is that a lot of hosts who go into this business are the kind of home-oriented people who enjoy making a place look interesting and beautiful, so it just kind of goes with the territory- we find it natural and fun to decorate and arrange a space.
I do upholstery work, and one of my clients asked me to pick paint colors and tiles, etc. for her vacation home here when it was being built. She told me that she's just not good at that kind of thing, that she knows what she likes when she sees it, but has zero idea of how to achieve the effect. So I understand that some people just don't have an "eye" nor are good at visualizing how something might look.
If you fall into the camp of my client, then there are so many helpful suggestions for inexpensive fixes and decor ideas online. Pinterest is a good one, for instance. And almost everyone has a friend or two who's good at that kind of thing, and might be willing to trade time if you help them out with something you are good at.