Determine...
- the size of the existing market
- the size of the potential market
- when the potential market will go from potential to existing
- will the existing market sustain the existing industry profitably
- how much of the existing market do you need to survive. can you get it. when.
- how much of the potential market do you need to be profitable. can you get it. when.
- discount this backwards to today.
- discount it further by the risk.
- your investor won't want to stay in forever. when can they exit?
- step back and see if these numbers make sense.