So they went the other way...
Product owners decided to transfer application maintenance and operations over to Visma Lietuva in Vilnius and received very ast results.
In just several weeks Visma Lietuva investigated the product, took over the architecture and domain knowledge, and set up a team of 3 software developers and 1 QA. It turned out that this team was fully capable in taking over both the 2nd and the 3rd line support. The team showed a great deal of enthusiasm, and within 6 months Visma Lietuva specialists were able to stabilize the product
and start adding new features to it.