Commercial Life-Support Break-Even Simulator (2D)

Commercial spaceflight — tourist flights, private stations, in-orbit manufacturing — turns life support from a survival problem into a balance sheet. This 2D simulator plays a mission out day by day across two linked panels: a live cost-vs-time chart for two architectures, and a pair of growing "cost towers" with animated resupply launches — an expendable "open-loop" system that resupplies every consumable from the ground, and a regenerative "closed-loop" ECLSS that pays an upfront hardware cost to recycle a fraction of its air and water. Tune crew size, mission length, launch cost per kilogram and recycling closure to watch the break-even day — the point where the recycler's capital investment finally earns itself back — move in real time, exactly the trade-off that decides whether a commercial operator flies expendable or invests in regenerative hardware.