We wanted to test out the lower income stuff though. 

This is the true test of the Architect, and the true test of the relationship between the Architect and client.  

Keep nurturing referrals while testing small-scale outreach campaigns.

If you would like I can provide a beta test so you can see the vision 

For washers located on floors above other living spaces, you should be sure to utilize "No Burst" flex lines to connect to the wall spigots.For the dryer, if gas, not a huge issue, although you need to ensure that new lines are properly installed and tested to prevent potential hazards.

Curious how others approach this: Do you prefer to act fast and adjust later, or slow down and stress-test every deal? 

The "more than anyone else" test is the one that trips people up when they have a full-service property manager.

The 100% LTV stuff is real if your ARV is clean and your deal stacks up, but they'll stress test your exit hard.

But, as @Aaron Zimmerman mentioned, there're multiple ways to meet (or fail) the mandatory material participation test. 

The Highest & Best Use tests are key to investing but most investors re not aware of the simple analysis.