I would say look for larger properties, more doors a lot more. If you don't you may get caught in the middle. Figure with 6-14 units all looks good until you figure what it is actually going to cost to pay a maintenance guy and a manager, your probably not going to make a dime. Say you have 10 units and after your mortgage and other property expenses (trash, mowing, possibly water/sewer, etc) and you happen to make $100 per door after this and assume the property is 100% full. What management company and maint. Personal is going to do this say for a grand per month, would you? Hence being stuck in the middle. You have income coming in but just not enough to pay full-time help, so a old real estate wise man once told me (this man owns 1200 units) you have to stay small and only have a few units that you manage on your own or you have to buy hundreds of units to where you can afford to pay a staff. Anything in between and you will have the headache of being the maint. Man, the manager and the leasing agent and now you will be working "in" your business instead of "on" your business.
So I now look to buy at least 100+ door complexes, and am open to partners due to this predicament.