Hello,
Before making any disbursement I would go to the beach that I have near my house because it is an excellent dispensation to catch crabs, limpets, sea urchins and also sea worms.
Part of the crabs and sea worms I would use as bait and with my skills I'm sure I could catch some fish.
Additionally, in the woods surrounding my house I could supplement my food with chestnuts from the existing wild chestnuts and also some mushrooms.
As for water, I would not hesitate to use public fountains in the village.
For personal hygiene I would use the showers on the beach.
So my 10 dollars would be reserved for 1 liter of oil (2 dollars), 2 kilos of rice (3.8 dollars) and 3 kilos of potatoes (4.2 dollars).
Another strategy I would follow is to try to sleep a lot of hours in order to avoid leisure and not to be tempted by superfluous expenses.
Best regards