The first thing you want to remember is the majority of your Kingdoms Live money should go to and come from Land. Land is a way of getting money without leveling up, which you want to do relatively slowly in Kingdoms Live so that you can be packed with weapons and army members before you go to more competitive spheres. This means that you may have to start out with some Quests to get a base amount of cash to purchase your first Kingdoms Live Land.
From here, you should try to wait it out as best as you can so that all your money for the next piece of Kingdoms Live Land comes from the first piece. You may also want to use any Kingdoms Live Legend Points on money early on. You are not going to get much money from your Kingdoms Live Legend Points early on, but it may be just enough to have a nice kick-start in terms of Kingdoms Live Land purchase. Though it is often a good idea to preserve your Kingdoms Live Legend Points as long as possible, this is a good tip.