I know there are a variety of screening practices used by landlords and property management companies.

TLDR: I do not think Kiavi operates with good business practices.

For someone rebuilding their real estate business and looking to transition into larger multifamily deals, what’s the most effective way to position yourself as a valuable partner in syndications—especially when capital is limited but market knowledge, deal-finding ability, and local expertise are strengths?

These people are living comfortable where they are now but not for long with SCI's practices to just make a quick buck.

Similarly to what Mark Cruse stated above, provide dignified housing, respect your tenants, and either have a good PM or make sure you are updated on the regulations and best practices for placing tenants.  

Location & expertise in manufacture rehab How did you find this deal and how did you negotiate it?

Unless you have some sort of subject matter expertise or access to an unfair advantage (cheap labor, ways to source off market deals, etc.), index funds are likely to provide an equal or better return with a MUCH lower hassle factor and more liquidity.

@Gregory Banks I can offer some practical advice and referrals.

@Andrew Steffens the pool of buyers that have six figures of cash (you really need about $150k in cash to buy a $500k STR), have some subject matter expertise, AND want to self manage is even smaller. 

Here are some practical changes I would make to improve your property's performance:- Change your guest count to 6- Your target market will be small groups visiting for fun (birthdays, concerts, events, etc.)