Business structure?

[Larry Flanagan]

I have been approached by a small-time industrial subcontractor who needs a money partner. He has contacts that will provide him with steady high paying corporate work. But they dont pay for about 30 to 60 days after invoicing. So he needs me to provide $25,000 upfront to cover equipment costs, payroll expenses, insurance, etc before the first paycheck. After the initial paycheck is received the operation should be able to sustain itself. He will split the profits 50/50. I do not know this person and still have some due diligence to complete but everything seems above board at this point. What sort of business structure would be most suitable in this case? What other steps should I take to secure my interest?