The easiest way to do that is the "Find a REIA" tab on the National REIA website.

Whether you’re trying to find off-market deals, build a pipeline of motivated sellers, or scale up your operations, there are some game-changing tools and methods that can seriously boost your efforts.I’m really passionate about helping others take their business to the next level, and I’ve seen firsthand how these approaches can deliver results.

Peter Harris - you have to change your sales funnel method!

That's why I do "constructive evictions" which includes a variety of methods like asking, telling, threatening, starting the eviction but stopping it when the tenant leaves, etc.

Easiest option would be a househack on a 3-4 family nonetheless happy to explore other options. 

I love the BRRRR method, having scaled my real estate portfolio from just 2 units to 18 in 12 months (From 2 units to 18 Units in 12 Months), and later from 18 to 60 units in the early months of the COVID-19 pandemic (18 to 60 Units During the First 9 Months of the COVID-19 Pandemic).

I understand vibration cannot be dampened, but I think voices and music would be dampened by this method. 

But, Acrylic is a more acceptable and long-lasting method than latex.For details about Acrylic method you can follow this fixing method of separating vinyl plank flooring

Then determine your method.    

It's the easiest way to try being a landlord without dealing with tricky renovation projects.