please correct me..

Base on my studies, here is what I understand:

1, how much do Copahue Project cost ?
Announcements --> raise $134m for Copahue Project
vs
Latest Presentation --> ~100mil capital cost

"Senior Debt accounts for 60-70% of the total project capital cost"
so 86mil account for 60-70% --> 123m-143m

2 how much assets ?
assets = $134m + whatever they have now = ~150mil
debt = $86m senior debt
Equity = 150-86 = 64m
Debt:Equity ratio = 86:64 = 1.31:1

3, what is ROE % ?
--> Profit before tax is 23mil on presentation
--> NPAT is 15mil on latest presentation
--> Total Capital possible around 150 mil (base on asset)

should I use profit divide by equity ? or assets ?

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so..It is $134m investment, yield only $15mil net profit per year ? (for 30 years)

doesn't sound good to me