The German league (BBL) has gotten better in the last 10-15 years. I know a bit about ALBA Berlin, which has a good following. This isn't a bad place to play: Chris Babb had a couple good years for Ulm and I think he was making like $400k at the time.
Riesen Ludwigsburg is kind of a middle-of-the-table club. They finished around 10th in the league. They play in a 3rd-tier international competition called the Basketball Champions League (which is lower than the EuroLeague and EuroCup).
If I had to guess, Nick might be pulling in $80k to $150k in his first year. Just a guess, based on other things I've read.