The loans on a house hack are going to be some of the most favorable ones you can get since it is considered an owner occupied plus you should be able to get a first time buyer bonus of some sort. 

How can i stop homeless/squatters occupying my property? 

Rent for rooms in the owner occupied unit does not  have this same benefit.   

Every adult should be screened and approved before occupying.

The one residential is moving out, so I could go with an owner-occupied FHA or conventional loan.  

We only got to go inside the ranch house and the 3 bed 2 bath mobile home as the others were occupied.

It's tough to recommend without sitting down and talking to you to determine what your goals are.What I would suggest is just buying an occupied or vacant house that doesn't need reno or minor reno, then either have a realtor rent it out for you and you take over day to day management, or you can put PM in place. 

Increased rents during due diligence, negotiated longer term leases during due diligence, will occupy the space and pay market rents on top floor starting February 2025

I'm unsure what the right path is, but I've been reading about investing in owner-occupied, multi-family properties.

We've posted numerous times that +95% of agents only know how to work with owner-occupied transactions which are mostly emotionally based transactions.So, why are you even bothering contacting these agents?