Is this realistic though? I've never seen a region with 50% lord's share and knights who are willing to stay there. It's usually closer to 10-15%.
That's not realistic either. A region with 6 nobles is extremely rare, a region with 1-2 nobles is the norm.
A knight in a big city can make 150-200 gold per week, which is more than most rural lords, let alone rural knights. Lords of large cities can (and, IMO, should) amass 4-5 knights without too much trouble
if noble density allows it; this gets very hard when noble density is low because people frequently want titles more than they want more gold. I'd rather be "Count of Badlandia" than "Knight of Richcity" and just request gold from the realm council constantly whenever they want me to march to war.
Rurals are very rarely going to have knights, it's going to be cities (primarily) and townslands that really attract knights, and that's just fine; it's part of what makes being a Margrave a more prestigious position than being a Count.
