This is easy to achieve early on in any game type. I chose financial conquest on normal with a fixed starting position.
Build your wood factory and a shack in your starting area, make sure the shack is producing level 1 tenants. Buy the biggest plot nearest to you and build 4 shacks that produce a mix of tenants and workers, build 5 - 6 better quality level 1 buildings that have tenants paying rent. You now have 10 -11 properties with tenants. You should also be able to build the cement factory.
Buy a small plot of land and put the cement factory on it. Buy another smallish plot and build a gadget factory on it. Your tenants will all start complaining about the lack of trees. Not all of them will complain immediately so hold off building trees until the achievement pops.