No gaming laptops are built truly "rugged", like the Toughbook you mentioned, and I don't think any from Costco there have all-metal uniframe bodies, which would be the next best thing, like the Razer Blades, but you can try googling around. Any laptops like the Razer Blade will be above your desired price range, though. Those metal uniframe bodies are pricey.
I think that MSI Katana with the R7-8845HS processor makes way more sense for a laptop. That CPU averaged 74 watts power consumption in Notebookcheck's Prime95 test compared to 173 watts for the i9-13900HX. In your price range there is also the HP Victus with the i7-13700H. That i7-13700H runs much cooler than the 13900HX: it averaged pulling 88W in Notebookcheck's test. Spec-wise the HP is the better deal because it carries the 4070 instead of the 4060, and for $100 less.
Notebookcheck itself has reviewed that Victus unit. FYI, 85% is a solid score from them. The very best units usually only get 92% or 93% (right now the highest scoring gaming laptop is the
Asus ROG Zephyrus G14 2024 with 93%). However, once again, this laptop runs warmer than is ideal:
They don't have a review for the Katana, only external reviews linked for the sister "E" variant from the same model series (the E variant carries the RTX 4050 while the F variant you see at Costco has the 4060). These are 2023 Katanas:
This page provides reviews and other infos about the MSI Katana 15 AI B8VE of the series Katana 15 2024 laptop.
www.notebookcheck.net
Tom's Hardware also did a review of a similar Katana unit, but from a different CPU series, in the same year's larger lineup (2023). It performed well:
Either seem like a respectable option.