diff --git a/scripts/node-manager.js b/scripts/node-manager.js
index 27e890c..8efc3a0 100644
--- a/scripts/node-manager.js
+++ b/scripts/node-manager.js
@@ -1,11 +1,21 @@
-const SAVINGS = 10E6 // Minimum bank account balance
-
+/**
+ * Manages hacknet nodes, purchasing nodes to reach the desired amount.
+ * Upgrades (Level, RAM, Cores & Cache) will be automatically purchased.
+ */
 export async function main(ns) {
+	/**
+	 * How to use this script
+	 * message - optional message to add
+	 */
 	function help(message) {
-		ns.tprint(`\n\n${!message ? '' : `${message}\n\n`}Usage:\nrun node-manager.js <num>\n\n\tnum - Target number of nodes\n\n`);
+		ns.tprint(`\n\n${!message ? '' : `${message}\n\n`}Usage:\nrun node-manager.js <num> [savings]\n\n\tnum - Target number of nodes\n\tsavings - Prevent spending bellow this point\n\n`);
 		ns.exit();
 	}
 
+	/**
+	 * Print header with logs
+	 * message - message to append to logs
+	 */
 	function log(message) {
 		ns.clearLog();
 		ns.print('===================================================');
@@ -17,34 +27,37 @@ export async function main(ns) {
 		for(let i = MESSAGE_HISTORY.length; i < HISTORY_LENGTH; i++) ns.print('');
 	}
 
+	// Setup
 	ns.disableLog('ALL');
 	if(ns.args[0] == 'help') help();
 	if(ns.args[0] == null) help('Missing number of nodes');
 	if(isNaN(ns.args[0])) help('First argument must be a number');
-	
 	const HISTORY_LENGTH = 17;
 	const MESSAGE_HISTORY = [];
 	const LIMIT = ns.args[0] < ns.hacknet.maxNumNodes() ? ns.args[0] : ns.hacknet.maxNumNodes();
+	const SAVINGS = ng.args[1] ?? 0;
 	let nodeCount = ns.hacknet.numNodes();
 
 	log();
     while(true) {
 		const BALANCE = ns.getServerMoneyAvailable('home');
 
+		// Check if we should buy a new node
 		if(nodeCount < LIMIT && BALANCE - ns.hacknet.getPurchaseNodeCost() > SAVINGS) {
  			nodeCount++;
 			ns.hacknet.purchaseNode();
 			log(`Buying Node ${nodeCount}`);
 		} else {
+			// Create an ordered list of nodes by their cheapest upgrade
 			const NODES = Array(nodeCount).fill(null)
-				.map((ignore, i) => ({
+				.map((ignore, i) => ({ // Gather information
 					index: i,
 					cacheCost: ns.hacknet.getCacheUpgradeCost(i),
 					coreCost: ns.hacknet.getCoreUpgradeCost(i),
 					levelCost: ns.hacknet.getLevelUpgradeCost(i),
 					ramCost: ns.hacknet.getRamUpgradeCost(i),
 					...ns.hacknet.getNodeStats(i)
-				})).map(node => {
+				})).map(node => { // Figure out cheapest upgrade
 					if(node.cacheCost != 0 && node.cacheCost != Infinity && node.cacheCost <= node.coreCost && node.cacheCost <= node.levelCost && node.cacheCost <= node.ramCost) {
 						node.bestUpgrade = {
 							name: 'Cache',
@@ -71,12 +84,13 @@ export async function main(ns) {
 						};
 					}
 					return node;
-				}).sort((a, b) => {
+				}).sort((a, b) => { // Sort by cheapest upgrade
 					if(a.bestUpgrade.cost > b.bestUpgrade.cost) return 1;
 					if(a.bestUpgrade.cost < b.bestUpgrade.cost) return -1;
 					return 0;
 				});
 			
+			// Apply the cheapest upgrade
 			if(BALANCE - NODES[0].bestUpgrade.cost > SAVINGS) {
 				const COST = Math.round(NODES[0].bestUpgrade.cost * 100) / 100;
 				log(`Upgrading Node ${NODES[0].index} ${NODES[0].bestUpgrade.name}: $${COST}`);
@@ -84,6 +98,7 @@ export async function main(ns) {
 			}
 		}
 
+		// Check again in 1s
 		await ns.sleep(1000);
 	}
 }