It may seem like it would take longer, but it's worth it to spend the points on L2 Science - even though it costs you 11,000 points, your researchers will earn points faster, so they'll get to that 50,000 faster than if you didn't buy science.

I'd skip building anything for a while (I don't think the orchard can sustain more than 10-15 villagers anyway) and put everyone on the research table - no building, no farming, no babies. If the food runs low, your villagers will go gather fruit on their own anyway (if they have some farming skill), so the bin shouldn't empty.

(At least, that's how my tribes have worked - I didn't keep a villager on farming until after the sharks were dealt with. But I kept the village population below 15, too.)