Limits on handyman-ing

[Kevin Izquierdo]

I've was a handyman and property manager for 3 years and in my time, I've done things from cleaning, painting, to plumbing, electrical, and replacing hot water heaters. I'm planning on buying a multi-family house and being my own handyman/property manager. My question is: what are the limits on what the handyman (me) could do in my house? Should I just get a contractor to do the things that I know I can do?