So i think it would be natural and they would not be interested in your money.
Why not? Same as in cheap friends who are interested in a free lunch or something.
Friendship happens when there is a mutual past-time to share, a similar culture/mindset and little to no business conflict. It also require that the other party has no friends already, or doesn't have a family that makes him busy.
All in all, it's very hard to make any friends when you are older whether you are rich or poor.
And can definitely ruin the friendship, if every few weeks a request for 300k to fix some stuff comes up.
Think of it this way. You were both serfs. He now got crowned king. You're not going to keep hanging out with a king anyway, might as well try to get him to make you a minor noble. It can change your life and the worst thing that can happen is you stay serf.
As americans say, why leave money on the table?
The difference in wealth is so large that the poor friend's life can be easily changed.
It would be smart for the rich guy to change his friends' lives without being asked, if they were friends and still close enough.
It's also true that people will also overestimate their friendship with the rich guy because now the king can easily change your life.
There is no way someone who suddenly becomes very rich will keep most of the past relationships.
From close friendships to the bulies from highschool, almost everyone will try to reach out and try to get some of that cash.