Thanks for your opinion Doovalacky. I believe it will impact the vals hence the decision.
As I said, the tenant were happy to renovate the property but they just wouldn't show up for appointments. One of the painters who quoted me came from Upper North Shore to Western Sydney and stood outside for 30 minutes trying to call the tenants who did not respond to the phone etc. At least have the courtesy to say they are either unavailable and/or no longer able to accommodate the works. Just come clean and honest. I would have appreciated their honesty over gaining time, which has been three months plus to date.
The problem you may have now,they may refuse to move, or argue any increase in rent ( stating you are trying to force them to move) , and state you are using retaliation because they chaged their mind about having their lives disrupted.
They probably have a pretty good chance of winning.
I'm rarely pro-tenant, but in this case...I would agree with them.