Plumbers

The big box chain stores, ie: Home Depot, Lowe's, has on contract, Plumbers etc.
And to be a contractor for these stores, they have to have passed their quality standards and reviews etc. So to replace our kitchen floor, for example, we used Home Depot. The flooring contractor they had/use, was great. They did a good professional job and was fairly priced.

I am not in your area but a lot of times, places like Home Depot or Lowes can refer you to someone.

Is your hubby a DIY guy? If so, he can use a snake and try to fix it.

My hubby rents a electric snake from Home Depot about once a year to clear our main drains. It is a messy job but worth it in the long run with plumbing expenses.

I've called Ace Hardware and have had good results. They have plumbers or will refer you to someone else.

Call your village and see who they recomend. They will at least let you know who to stay away from.