Buy/sell Rating for Non-revenue Producing Firm

Hey! Currently trying to solve an ER equation.

I’m asked to value future revenues for a non-revenue producing healthcare co. that’s estimated to get approval in 2026, and then select whether to buy/sell the stock. Based on current market data I made some assumptions on market size, price, etc over a period of x years following (suggested) approval. But I’m not sure which valuation method I should use next.
 

Thanks for the help. The startup aspect of this is throwing me off.