By the way, this is one market that is going to expand rapidly in Poland in the near future
Not if Sanepid have anything to do with it. They already raided and shut down several companies doing this, and it's very, very difficult to meet their requirements with such a service.
Of course a lot of people prefer fresh food but the market for frozen food boxes seems quite good as well.
That's fascinating, though it shows you've done your homework.
I'd try posting on Facebook groups connected with Gdańsk, as you won't want your supply chain to be too long.