Mike, certainly there are travel agents who make enough money to own a home with their spouse and kids, own a car or two, etc. Travel agent salaries are not high, but like any sales job, there are ways to work hard and make more money. Depending on where in the country you live, you could do fairly well.
There was a study that came out about 10 years ago, regarding travel agent salaries. At that time, the average agent who had been in the business for 10 years was making around $35-40K. I haven't seen any "official" figures since then. Obviously, that money goes a lot further in some parts of the country than in others.
I work full time as a travel agent, but I am part of a two-income family. I love what I do and continue to do it, despite the possibility of making more money, but not being as happy, in another type of work.