Excuse my ignorance: By skimming through the program rules, I got the feeling that you can only expense up to $40K over the 6-month stay in Chile, but not save some to take away with you when the batch finishes, am I not right?
That's completely dependent on what you submit fr reimbursement. There's absolutely zero rules stating you can't outsource $40k worth of work to a company in your home country that you just happen to own. As long as the work has been 'completed' in they will reimburse it. Start-Up Chile will not pay for things that will happen, only what has happened, so you can't get advances.