I'm have been asked to enter into a partnership with an experienced investor, and I'm not sure how to or the best way to structure a partnership.

The best way to see if someone is a reliably paying tenant is by their credit score. 

The best way to find an investor friendly broker is at a RE meetup, but you can also just ask around in your local network or google.

For those who have applied and don't meet criteria, what is the best way to communicate that you aren't moving forward with them that does not risk violating any fair housing rules? 

The country is great for lifestyle and I believe most American (and other foreigners) buy for lifestyle.

Per this NY Times article, the average American knows around 600 people.https://www.nytimes.com/2013/02/19/science/the-average-american-knows-how-many-people.html#:~:text=The%20average%20American%20knows%20about,do%20you%20know%20named%20Kevin%3FPer the US Census Bureau, the average American moves 11.7 time in their life, which based upon an approximate lifespan of 84 years, works out to be about every 7 years.https://www.census.gov/topics/population/migration/guidance/calculating-migration-expectancy.html#:~:text=Using%202007%20ACS%20data%2C%20it,one%20move%20per%20single%20yearSo, if the average American knows 600 people and they each move about every 7 years, that means that the average American knows around 85 people that move in any given year.How many of those moves do you want to be involved in?

In 2022, half of American renters spent over 30% of their income on rent and utilities, the highest percentage ever recorded. 

Hi! I am under contract to buy and flip a house that I am paying $615K for. The land is on two tax lots so my plan is to sell the extra lot immediately after closing for a projected $275K.The property on the other lot...

That puts you in the top 60% of Americans.

At the moment, we are using American Modern and Sage Sure through our insurance broker.