Fairly difficult to provide a meaningful response at this stage with limited information offered. There are many different things that can have an effect either way. For example are there many other office buildings in the area, are they in high demand etc etc.
I am from Melbourne and i am charged 7% management fee with a 50cent monthly charge to have the monthly statement emailed to me. The only additional charges is a letting fee which is the equivalent to one weeks rent.
Definately agree with previous replies. The rent is always payable by a certain date (ie 5th of each mont) per your lease. Once it didn’t hit the bank account for the first time, that is when you should start asking questions. The longer it gets, the hearder it is going to be to recover.
Also, don’t forget that if you were to be paying capital gains tax on the property, the depreciation that you had claimed in your tax returns from the time it was rented would have to be deducted from the purchase price.
