Hey Maurice !
I don't know if you have made a decision yet but it all comes down to your goals and priorities.
Goals: Are you going to aquire more rentals or is it just the fourplex you'r gonna own?
If u are comfortable with it and like it, go for it, if not---> get a pm.
Priorities: Your time, do you like the feeling to get called over and fix things or would it just be easier to sacrifice a % of your cashflow and let a pm handle it ? And/or use your time to look at more deals and increase your cashflow or just do whatever you like to be doing?
Either way i would suggest you to look at the apartment/building as a business whatever the size it is, pm usually have better rates for equipment/work so in the long run, you are better off with a pm according to me.
Summary: If you look st it as a hobby, do it urself if you want. If you are serious about it you should threat it as a serious buisness and have a pm in place so the operations goes smoothly.
PROS:
1. A pm will have a better eye how to operate the property if it's a serious pm that can see that when you/your estate is succesful, he/she also is.
2. Size dosen't matter, it just comes down to HOW you operate it, if u think you can operate it better than a pm, then do it urself, if not: let a pm handle it.
3. You will not be dealing with the residents, your pm will.
The only time size matters is when things aren't going your way and you have poor management in place, then you will see a bigger loss @ a bigger property and a smaller loss @ a smaller property.
CONS:
The only con atm that i can see is if you have a bad pm @ your property, then they will destroy your property value, and that is not your goal if you invest in properties, so make sure that you get a good pm and not a bad one.
I hope my advices were to some help for you to reach a decision, cheers!