I'd say have $5-10K for out of pocket business expenses after "getting to Chile" expenses. The things that you need to begin the program - plane flights, visa costs, mandatory 6 months of travel health insurance - can easily eat up $5K all by themselves, depending on where you're coming from. The visa fee for UK citizens is almost $1500, for example.
If you don't have enough money to pour in up front, cash flow will drive you crazy. Put together a six-month budget, even if it's loose. Put every expense you can think of in it. Reimbursements can only happen once a month and you absolutely need to plan things out to get the most out of the funding.