Need direction on what to do now?

[Brandon Turner]

Here is my situation, I started investing last August when I got 1 house, this month I am buying three houses.  All of these so far have been houses with tenants already in place and I am using a property manager. Things have been rolling along well now I am going to have to sit a while and build cash back up. Wondering what to do after that? Would I just continue to buy one house at a time or would it be better to try to scale up (larger package of sfh or small multis) I work a steady job and my strategy right now is buy and hold.