According to their agreement, Tesla would pay him the dividends for his 50% share of the company once every three months. That means Tesla would pay him four times per year.
So he won't receive anything from his partnership with Tesla until after three months. He can't wait that long, which is why he asked Tesla to give him 100 gold coins first.
He has a lot of needs. He doesn't care about what he eats and where he lives as long as what he eats is nutritional and where he lives can protect him from rain and cold. Currently, his living conditions can't protect him from the cold, so he needs to fix that.
He also needs to start preparing to become a godclad. All of these will need a lot of money.
He should need between 10 gold coins and 50 gold coins for his preparation. But he asked for double his maximum estimate from Tesla just to be careful.
In this world, gold is worth a lot of money. A single gold coin is 100 silver coins, and a single silver coin is worth 100 copper coins.
