unsure what to do

hello to every one we are in the process of buying our first investment property in southern wa with an 11% return which is fine .My problem is this we bought a house in the place where im working 4 months ago and current market value is 150,000 more than what we paid for it .My job is currently paying 24-2500 a week and if i sell i will have to leave that job and also town as housing is at a premium.We have been offered $1000 a week rent on a 12 month lease so im wondering if selling and leaving is a good option as i cant see the property going much higher than thatdue to the age of it