Hi Milan,
We have a sewing program at the Manistee County Library for kids, and we are currently starting a program for Adults. We purchased 4 Brother sewing machines XM1010 (product code 888-X73) from Amazon and 1 inexpensive Singer Start model. We also have 3 different ones that were donated to the library. The Brother machines work really well. It's very simple to use and the instructions include a CD/DVD.
We started out with an inexpensive Singer, and I personally do not think it is a good fit for us. It seems like it has lots of issues. We also purchased some really cool sewing bags (Kemanner sewing machine carrying case in several different vibrant colors) from Amazon to keep them clean, and makes transporting them a lot easier.
The Mid-Michigan Library League has 2 sewing machines and 2 accessory boxes to borrow as well.