REJS7 - that's the idea! 
Here's a little something I drafted yesterday. Feel free to argue, donate thoughts or elaborate.
Buildings and structures
Base is an analog to city. This is a place where all the improvements are built.
Walls are basic base protection. Add little defense bonus to units inside.
Barracks the place to build your infantry forces. Allows upgrading existing units to more advanced once the necessary technologies are discovered.
Windtraps allow advanced buildngs (basically anything besides walls, barracks and spice refinery) plus provide initial boost to production.
Spice Refinery allows advanced building (same as windtraps), base population growth, provides initial money earning boost.
Construction Yard allows building of MCVs, harvesters, upgrades infantry and light vehicles to next level.
Light Vehicle Factory allows building of light armored vehicles (trikes, quads, light transports).
Heavy Vehicle Factory allows building of heavy armored vehicles, upgrades light armored vehicles to next level.
Repair Depot repairs any unit that spends the turn on the Base. It also upgrades LAV and HAV units to yet another level.
Shielded Walls advanced city protection, upgraded walls.
Research Center (Mentat House) unlocks further technology advancement and allows building of more advanced buildings and structures.
Spice Silo spice storage center. Provides bonus in spice harvesting, money and increases the production speed.
Radar Outpost increases the range of vision of units and allows air units.
StarPort allows trading with other/minor homes, unlocks alien (Ix, Tleilaxu, etc.) technologies, allows building air transports.
Shai Hulud Chamber (Fremen Sietch) produces Fremen Fighters that can be upgraded to Fremen Fedaykin (some sort of elite warriors) that, in turn, may be upgraded to Worm Riders (fremen did that too).
Ix Research allows research of some of the Ix technologies to be researched as well as units used (Projector Tank, Infiltrator)
Tleilaxu Research allows researching technologies of Tleilaxu (Ghola Bowls or Tleilaxu Flesh Vat), provides bonus to infantry units upkeep (clones are cheaper) or produce certain units for free every N turns.
Sardaukar Barraks (Imperial Control) produces Sardaukar that later can be upgraded to Elite Sardaukar (even more fearless and ruthless).
PS! Sand worms (aka Shai Hulud) should be the barbarians

Here's a little something I drafted yesterday. Feel free to argue, donate thoughts or elaborate.
Buildings and structures
Base is an analog to city. This is a place where all the improvements are built.
Walls are basic base protection. Add little defense bonus to units inside.
Barracks the place to build your infantry forces. Allows upgrading existing units to more advanced once the necessary technologies are discovered.
Windtraps allow advanced buildngs (basically anything besides walls, barracks and spice refinery) plus provide initial boost to production.
Spice Refinery allows advanced building (same as windtraps), base population growth, provides initial money earning boost.
Construction Yard allows building of MCVs, harvesters, upgrades infantry and light vehicles to next level.
Light Vehicle Factory allows building of light armored vehicles (trikes, quads, light transports).
Heavy Vehicle Factory allows building of heavy armored vehicles, upgrades light armored vehicles to next level.
Repair Depot repairs any unit that spends the turn on the Base. It also upgrades LAV and HAV units to yet another level.
Shielded Walls advanced city protection, upgraded walls.
Research Center (Mentat House) unlocks further technology advancement and allows building of more advanced buildings and structures.
Spice Silo spice storage center. Provides bonus in spice harvesting, money and increases the production speed.
Radar Outpost increases the range of vision of units and allows air units.
StarPort allows trading with other/minor homes, unlocks alien (Ix, Tleilaxu, etc.) technologies, allows building air transports.
Shai Hulud Chamber (Fremen Sietch) produces Fremen Fighters that can be upgraded to Fremen Fedaykin (some sort of elite warriors) that, in turn, may be upgraded to Worm Riders (fremen did that too).
Ix Research allows research of some of the Ix technologies to be researched as well as units used (Projector Tank, Infiltrator)
Tleilaxu Research allows researching technologies of Tleilaxu (Ghola Bowls or Tleilaxu Flesh Vat), provides bonus to infantry units upkeep (clones are cheaper) or produce certain units for free every N turns.
Sardaukar Barraks (Imperial Control) produces Sardaukar that later can be upgraded to Elite Sardaukar (even more fearless and ruthless).
PS! Sand worms (aka Shai Hulud) should be the barbarians
