If you have a great broker and or commercial attorney or both then they are less likely to keep trying these tactics throughout the purchase process.It is RARE but sometimes you run across an amazing property ( I see them maybe 10% of the time looking at thousands a week nationally) and it is heavily marketed and receives tons of offers instantly.

So I talked with an Asset protection attorney and he concurred, also there is a great book "So Sue Me" that also suggest, this tactic.  

One of the tactics some landlords use is to go to court and get permission from a judge to move into one of the units or a family member move into the unit for 2 years until you can rent it on the open market again.It is an expensive and long process and not easy.

I've tried some of the tactics mentioned above but some I haven't.

While most of the thoughts/ideas so far or that most family members/friends/lenders/Brikers/etc may give you could be seen as the "tactics."

Not only do the agencies have aggressive collection tactics, they sometimes file suit.  

MLS tactics depend on the market, if you are in a soft or slow market, everyone is looking at the same deals.  

These are all tactics that most people utilize.  

This is the typical "professional tenant" tactic, and its the nightmare scenario for landlords.

You just have to use different tactics.