Vig, or juice as it is sometimes called, is the price you pay for a loan.

Example if you borrow $1000.00 you may be required to pay $100 vig, or juice on the principle per week until the loan is payed off.

People borrowing money this way can pay much more than the value of the loan before it is payed off.

However, they usually are not borroing the money for home improvemenmts.