I currently self-manage three properties in the Atlanta metro area and have learned a ton through trial and error over the years.

Property management is not for the faint of heart, so glad to see you're enjoying it and thriving.

@Gary Abrams A cloud based solution would work really well in your scenario of having other family logging in and helping with management. 

This means you have an investment manager of the fund  buying stocks that are managed by managing teams.

Staying involved in a business partnership while dissolving the marriage will rarely work.If you split the properties, I recommend hiring a good property manager.

This is the simplest method, but it also means your tenants are more likely to abuse the utilities by leaving windows open with the heat or A/C running, leaving lights on, ignoring the toilet that constantly flushes on its own, etc.3.

In the past when I am looking for a property manager I google to find all managers with physical offices in close proximity to my properties to narrow my search and ignore all sponsored adds that fake that they are local.Since you have self managed, you will be better equipped to "manage the manager".

Quote from @Andres Lasaga: I am in the process of selling a property to the tenant I have been renting the house for 4 years.I want to outsource the promissory note collections and reportsIt would be only ONE property, for now, any recommendation of a company that can manage the collections and reporting?

I would consider getting out of property management and getting into cleaning IF you think they are doing better than you . 

Try interviewing at least three managers.1.