Depends on if you pay monthly VPS, or host VPS yourself. To configure node though you need single address with 25,000 BSD in 1 transaction.
So you only need it once for that transaction? It's not like you'll lose it?
You rent a server for 5$/MO and lock 25k as collateral.
While collateral is on place - masternode is working.
You can quit anytime - coins are still on your wallet.
Configuration is pretty easy - look for the
guide and
server-installation script on github.
If there's any problems - contact me.