We like postcards - they have higher visual impact and cost about 1/2 what letters cost, meaning we can hit twice as many people for the same marketing $.  

Is a strong enough deterrence for motivated sellers,buyers, investors or not?

To anyone is NLP it more than likely means you VISUALIZED yourself doing a task.

You need to put a lot of emotion around your WHY and visualize what life will be like for you both, your family, your legacy, etc. 

You will probably hear more than you could possibly find out by visual inspection from things like what’s buried in the backyard to the fence being propped up by sticks.4.

@Roy Assaf ,All marketer marketing and hype aside.....1 Absolutely agree with @Michael Quarles  that yellows are the wrong approach for multifam....especially in Brooklyn. 2 Sample size is small, but to get ZERO calls, not even a "go to hell" or "I'm gonna shoot you in the head"....there's definitely something wrong.I assume you've checked all the basics, actually visually inspected your RTS to make sure everything is printed properly and phone number legible?

.$50/month I would not put as an incentive to work my butt off nor as some huge deterrent to getting into a program I thought would benefit me.Personally I think that the "you value it more when you pay for it" stuff is the biggest load of guru bullsh*t that there is.  

It's a little hard to have a clear idea without a better idea of the space, but I'd think a wall would be the least visually weird option.

Visual Basic?

Focus on the visual but make sure the copy is clear, concise, engaging, and has a clear call to action.