I found that there is a lack of advancement for the landlord feat after level 20, and most of the time, those are exactly the levels where someone will have this feat, and will want to get a proper fortress home. So without further ado, I present an epic advancement for landlord:

Level Stronghold Allowance Additional Funds Gained
21 1,000,000 200,000
22 1,200,000 200,000
23 1,400,000 200,000
24 1,600,000 200,000
25 2,000,000 400,000
26 2,400,000 400,000
27 2,800,000 400,000
28 3,200,000 400,000
29 4,000,000 800,000
30 4,800,000 800,000
31 5,600,000 800,000
32 6,400,000 800,000

For now it goes up to level 32, but afterwards the allowance increases by an amount that doubles every four levels.

What do you think about this? Did I get it right or should I make some changes?