Ok, so currently, my empire is sprawled halfway across the map. My Metal and Crystal income is good, but my Gold income rate has slowed to a crawl. Why? I thought that the more planet you have acquired, the more tax income you receive. What's up?
Thanks
Try building more gold mines. Make sure you have at least 6-7 peasants going into each gold mine, depending on the distance from your town hall. Your lumber mills should be able to get you by with only a handful of workers chopping trees. You'll be able to afford the upgrades to your knights in no time!
If you're playing Sins of a Solar Empire and not Warcraft, however, I'd recommend making sure all your planet's are fully upgraded (more people = more taxes) and to start building trade centers. Selling excess metal is a good way to earn quick income as well (research the +metal technologies and you'll be getting an abundance very easily, very early).