One thing about home planets is that if properly configured, they can produce and store mass quantities of spice
. Usually your home world has a relatively inexpensive spice, so it's hard to make profit from it.
If you conquer another space-faring empire's home star system, you get to keep all of their homeworld cities, while reaping the benefits of increased production speed from a satellite-system. What that means is, you keep their homeworld, and it makes spice really fast for you.
How do you get a homeworld you might ask?
Well you could
randomly run around the galaxy hoping to find one, and hope that it has the right color spice for you, OR you could find an uncolonized
star system with a planet that has the right color spice, get that planet to T3, and drop a monolith, and wait for it to become sentient. Sounds complicated, but it's not, I promise. Yes, this is late game, but I usually do this on the second planet I colonize in space stage, and it doesn't take terribly long. (First star I colonize being a normal purple spice planet with 3 incredipaks set to 2 happiness)
Once that empire reaches space stage, either take it over with Fanatical Frenzy as a Zealot
(and be prepared for everyone around you to go to war with you) OR you can be a Trader
and set up a trade route immediately. Remember you get a +50 relationship bonus for using the monolith to make them space-faring. Right after you set up that trade route, SAVE, and use your Cash Infusion ability to fill the trade bar and buyout the star. If your buyout offer doesn't take, just close and restart spore to try bigger offer. If you're not a Trader or Zealot philosophy, you can still take over the star system with a trade route, but it's going to take a little longer, and you might have to do some of their quests or drop an embassy to boost relations.
So you got a homeworld. Congratulations!
Think you're done? CLOSE! Not quite, but close. We're almost there. I suggest selling all the buildings on the planet and then laying out your buildings. It costs a little more, but not much. There are 9 different city layouts on each homeworld. I always set my planets up for maximum spice production while ignoring happiness. Homeworlds don't tend to riot, and once you're at this point in the game, buying and dropping a happiness-booster is ezpz. I have never had a homeworld with a happiness booster riot on me. I always max out my turrets and drop an uberturret and a spice storage too. But that's up to you. Below are the layouts I use for my cities. They are aligned with the City-Circle in the front for easy orientation.