Pay off loan or use money to invest?

[Jonathon Weasel head]

I have a vehicle loan(conditional sales contract) of 60,000. I have the money to pay it off. My vehicle payments are 960/mth which i can afford. I also have a l.o.c of 25,000 that i want to increase. Do i pay off the loan or do i use the money to invest. I would like to buy rental property and/or possibly get a laundromat. I dont know the smart move.