Resources should be obtained mainly from attacking other players. Level 10 Vault can protect 3 million of each resource, which is more than enough to set a few buildings. I find it useful even at 10 million power, because even if I am attacked overnight I can still set some buildings to build while I get my resources back. Now get that sucker flocked and painted so I can edit this. Looks like a pretty accurate copy of the original (skull pits notwithstanding, but I'm not a fan of those on the original anyway), so mission accomplished so far, but I'd have to give it a temporary 9/10. The reason for no Theater is that you only really use it in the beginning and it is usually at the top of the list for nullifcation later on, therefore, it's better to just not build it in the first place. Product: Realm of Battle ported successfully into Realm of Budget.

If you are able to nullify the fields later, build less houses and more garrisons. If you don't have any fields, you can build less houses or just use the extra population for troops. The reasoning behind this, you must have enough population to build troops! And unless you start the realm and join an alliance that is well established, you have to have a few thousand extra pop for fields when you start out.

The above is assuming you have around 10 fields at level 5.

Battle realm building types