Doesn't sound like much. Or am I misunderstanding the concept and ROI?
EDIT: >ZenCash Secure Nodes Calculator and https://securenodes.eu.zensystem.io/
Interesting. Stats show around 5700 active Zen nodes globally and at $37 a coin you're making around $50/month (1.3 ZEN) for each node before VPS hosting costs. Unless coin value goes up or number of nodes stops increases, it won't be worthwhile creating Zen nodes.
I went through the math on this - I wanted to do secure nodes initially before I looked into mining. Secure nodes not profitable enough.