You can rent an instrument for just a month or for as long as you want.
Rental fees accumulate rental income (rental fee = rental income) . For up to 18 months you can accumulate rental income, which you can use within 30 days of the end of the rental period to buy an instrument from How Violins.
Up to 50% of the purchase price of the instrument can be paid with the rental credit. For example, if you have a credit of €500 and you want to buy a €1000 instrument, you can use all your credit and pay only €500. On the other hand, if you chose to buy a €500 instrument, you could only use €250 of your credit and pay the remaining €250 for the instrument.