As far as the users' preference of view over space...

So far I got only individuals with a rent limit of 1200-1600is it  common to let  2 - 3 individuals who don't know each other rent the house?

They prefer to purchase a duplex in a C location because they have read a book about the 1% rule and/or the BRRRR rule.

Everlance is one that I prefer, but that one you have to remember to open up the app and turn it on before each business trip. 

Also, in a mainstream asset class like value-added multifamily, I see no reason to take a risk on a sponsor that doesn't have full real estate cycle experience or that lost anything more than a small amount of money (and prefer no money lost).

I’m looking to connect with:Partners who can bring resources or experience to the table while I handle the heavy lifting of deal-finding, analysis, and management.Investors interested in deals with clear strategies and long-term potential.While I’d prefer to build a portfolio for the long haul, I understand the market always has buyers.

100% agree with @Collin Hays - find a local manager, preferably one not too large or not too small, I would say 30-90 properties is usually a sweet spot.

How much time / cash / other are each individual expected to contribute?

I generally prefer higher since I don’t plan on putting in small claims, it’s basically just for catastrophic loses and the savings in premiums over multpiple properties for multiple years should balance that out if I have ever have to use the insurance.

I prefer the multis because there’s one set of expenses and multiple rents coming in.