Follow the confirmed loop
Scoop sand, use the mine cart to haul it home, and convert that work into nuggets, coins and gold bars. The official page does not publish a best upgrade order, so spend toward the bottleneck you can see instead of treating an unverified route as mandatory.
Treat upgrades as experiments
The game advertises upgrades without a cap. Make one related change at a time, then compare whether it helps your present goal: faster collection, more conversion progress, or a gold-bar milestone.
Use the badges as clear milestones
The official Roblox page lists badges for a first Gold Bar, 1,000 Gold Bars and 100,000 Gold Bars. They are useful progression landmarks, but they do not establish a universal time-to-complete or optimal build.
Source
Gameplay facts on this page are verified against the official Sand To Rich Roblox page on October 1, 2026.