说好不重新漆两个房间收五百,You need to download a damage addendum, such as this one: http://www.rentgrandin.com/pdf/Damage%20Addendum.pdf
and in second page, put down, tenant agrees to paint room 1 and room 2 in white upon moving out. Otherwise $500 shall be deducted from the security deposit.
去找两个amigo两百五一天还做不完?