For me, I’ve been testing a few different methods recently, but I’m always looking for new ideas to take my wholesaling game to the next level. 

Your current numbers make no sense (600K property at 70% is 180K down and 420K financed, but four 300K properties at 95% is 60K down and 1.14M financed).The odds of finding someone to loan 95% on four investment properties is extremely slim.

I had a tenant force me to pay for some dumb azz air quality test where she claimed my air was bad and making her sick. 

This didn't pass the smell test???

In our student houses we use a programmable thermostat, but our building monitoring system has its own sensors and can override the wall thermostat and will not allow the temperature to get below 10C (50F) ... we are presently testing a new software load that will also prevent them from cooling the house too far in the summer.

And even though virtually every sponsor agreement allows me to share investment information with others who might be advising me on it (especially when club members are bound by an NDA), I still ask the sponsor if I can share it, because it's a test.

I do an AI for REI seminar and just discovered a new tool I'll likely test out soon. 

EX: I ran a few real estate ads targeting real estate agents on FB. as a test since I never did an ads before.

Debt financing will be slim pickings

I just want to focus on what I do and whether I can legally employ one or another approach/strategy, to test its viability.