Return on Investment for the Prospector Workshop Building
is a valuable building that produces chests. When opened, these chests have a chance to yield , which can be refined into using . This raises an important question: how quickly will this building pay for itself when purchased with ?
Calculating average crystal yield per chest
First, let's examine the drop rates for from . The chest may also contain 15 , which can be refined into 1.5 at the using 
High Pressure Pump
.
High Pressure Pump
Each chest opening provides three possible outcomes:
- 10 at 12.5% chance
- 1.5 at 13% chance
- Other loot at 74.5% chance
The average yield per chest slot is (10×0.125) + (1.5×0.13) + (0×0.745) = 1.445 . Since each chest opening provides three slots, the total average yield is 3 × 1.445 = 4.35 per chest.
Converting crystals to gems
- 30% chance for
- 10% chance to refund 2 *
- 60% chance for other outcomes
*Note: While some sources suggest a 15% refund chance, practical testing shows approximately 10%.
Let's examine this process in more detail. When processing 100 , we will on average obtain 30 and approximately 20 returned (a 10% chance to get 2 per attempt). This means the net cost will be 80 to acquire 30 .
Every 3 can be crafted into one of four quest items: , , , or . Completing these quests rewards 50 each.
Therefore, 30 convert into 10 quest items that yield a total of 500 . This means every 80 ultimately produces 500 . Dividing 500 by 80 gives us the conversion ratio: on average, 1 equals 6.25 .
Return on Investment Calculation
Considering that this building produces one chest per day containing an average of 4.35 , which after processing yields approximately 27.18 daily, we can easily determine the payback period for our investment.
With the building costing 7999 , dividing this amount by the daily income of 27.18 gives us a payback period of 294 days (or 10 months). For the bundle priced at 14499 that includes this building, the investment return period would be approximately 533 days (or 1 year and 6 months).
In conclusion, is a worthwhile acquisition for active players as it provides steady growth of valuable resources and guaranteed return on investment.
If you have any additions or comments regarding this article, I invite you to discuss them in my Discord chanel.