you cannot lease a car for 3 months. Minimum is 12 months.
If you could lease a car for 3 months, the rentals would be so high, it wouldnt be worth it.
If you think about it, a ford focus at 15,000 miles per annum on a 36 month contract hire contract is approx (looking at my database) �268/mth. Dont forget you have to think about residual values etc etc. Do the math and tell the person that told you that that they are a plum