Okay, there's no way can "spawn money in". I'm assuming you're talking about the unturned economy plugin,
If the server has kits you can create a bot/macro/hack to do the kits every x amount of seconds and sell everything in there, leave this on idle for a good 2-3 hours you can make a fair bit of profit, at least on the server I play on I make around 52k like every day and I use a vps to run it 24/7 52k = 100 timberwolvles or 520 military drums.