IMHO 42 ZEN is too low entry level for a Service Node. Whales would be able to manipulate the whole network..
Make it at least 100 ZEN and a reward ratio miners/nodes/governance at 65%/25%/10%
Nodes are important and they should be well paid.
I disagree. The whole point of the low barrier to entry is to have enough independent nodes to counter balance any "whales" that care to get into the node business. This is similar to the problem bitcoin faces where the very high hashrate requirements force centralization of large bitcoin farms, and keeps independents out of the race.
At $10 a coin, it's already $420 to establish a node. If the price goes up or the required Zen per node goes up then it becomes harder for a small miner to get into the game. At $100 a coin, $4200 is a lot of scratch to come up with. It's a tough balance to tread for sure.