Oil is discovered in a land. The owner could:

Drill herself:

Cost of equipment $=300$k

net annual cash flow $=600$k for $5$ years

then the land can be selled for $1$m

lease a drilling company:

net annual cash flow $=630$k for $3$ years

the land can be sold for $800$k at the end of year $3$

MARR $=15\%$

Which option to pick?