I'm currently wrapping a Oirat->Yuan + 200 grain campaign, which reminded me of the basics of horde money:



1) GOLD

2) Trade

3) War



Gold should be your main income. Pretty much every horde has a gold mine nearby. Grab it as your first priority and move your capital there before the Renaissance hits. Now develop that gold mine for every institution and you should also gain a solid income. You'll be gaining plenty ADM to handle inflation through razing.



Trade is tricky, but basically you state every Gold/TradeCenter region, keep the gold/tradecenter province, and give everything else to your tribes. This gives you great income and happy tribes. After Gold, focus on trade regions that you can collect/steer from.



And of course, war actually profits you as a horde. Loot the provinces you won't be taking in the war, and raze -everything- you take. Take war taxes whenever you're not behind on tech, and take war reparations from all large enemies (it's almost always worth more than one province from someone like Ming or Muscovy).



Doing all of that, money should become a non-issue for you even faster than for a non-horde, as you have fewer things to spend it on. Building are less useful, and you won't need mercs once you gain a little manpower.



In my game, I took a few early loans while I was growing, but have never had any money issues since. Currently I control all of Asia and am just waiting on integrations of my Persian and Russian lands to get those 200 grain provinces. Horde money is different, but once you adjust, it's actually easier.