how can you run 5 different coins on one vps ?? how much GB RAM does one masternode require? for $ 5 only 1GB of memory!! and for one masternode recommend 1gb
i have 8 masternodes and 8 *5$ differents VPS !!! = 40$ every month
I am running 3 different coins on a machine with 1GB of RAM, didn't have any problems so far...
Just give it a try and run 2 coins on a node. It could save you quite some VPS cost!