In order for it to serve as a gold sink for Alora, the price would need to be set at a high level. It is important to consider the gold obtained from high alching dragonhide bodies.
Green d'hide body
Alch price: 4,680
Ingredients: cost of 3x green dragon hide + cost of tanning each
Given those numbers, how high can you possible set the price of tanning noted hides?
If you charge 1k each, the price to tan the hides is already 3k.
Then you must factor in the cost of the green dragon hide (let's say 1k each - big underestimate).
This makes the price to produce a single green d'hide body 6k, which is already 25% more than the alch price.
Blue d'hide body
Alch price: 5,616
Red d'hide body
Alch price: 6,738
Black d'hide body
Alch price: 8,088
What's my point?
Who cares about sinking GP from d'hide bodies? Barely any gp even enters the game this way.
The time it takes to kill 3 black dragons, tan the hides, craft the body, and alch it for 8k gp -> already makes this horrible GP/hour
Now juxtapose that with thieving elves at priffdinas, where players can literally click once and earn 8k gp.