I think FFP is based on 3 years including forecast for the season ahead, so effectively you can spend what you know you'll be getting (balanced against gates, salaries, sponsorship etc, etc) though obviously it's prudent not to blow everything in case you yoyo.
Edit - not what you asked...
I don't imagine you get it up front as much of it depends on appearances and final position. So I guess Tony will have to dip in - but deals will be structured over a couple of years in any case.