Consider if regular visits and handling emergencies from a distance are feasible.2.

and that's my first step - getting some of those tasks handled. 

I market, negotiate leases, handle maintenance, and directly coordinate vendors/tenants.Kent Retail Center – There’s a third-party PM, but I’m still the active manager.

What’s the smartest way to handle a large one-time gift like this to minimize headaches down the road?

Once you are able to create your own mailing lists as an agent it might be more economical to use one of the many marketing companies that target agents to handle your direct mail campaign.  

Tbh most of what you do can be handled in simple phone calls.

Like to get feedback on this and how everyone is handling this.

So I have a staff member who such persons can call (NOT ME) to handle things like opening a ticket in the portal.

Use a Wi-Fi lock, entry camera, and noise monitor so you can handle issues remotely.

Quote from @Nina Diehl: Quote from @Patrick O'Sullivan: @Nina Diehl you handled this really well, especially for your first rental.