Evening lads, looking for some feedback.

>Why are you doing this?
To Improve player power and agency, allowing them to earn both ASIs and Feats.
>Time intervals
These are adjusted with my own campaign in mind. They may seem either generous or harsh to you; they are considered.
>Costs
These are the levers I'm most uncertain about. Ultimately, I am the one that controls how much gold the party will have, so whether or not the amounts stated are appropriate is somewhat moot, especially with how limited they are.

What are things I need to be careful of, and to look out for? Are there any specific interactions that could bite me later on? I trust my players, and for the most part, they're all very well-behaved, and don't tend to optimize or resort to severe power-gaming.