If money is a problem, staying current in a Pitts will be a BIG problem.
I love flying the Pitts but it a real handful to land. The FBO where I fly has a 30 day currency limit for soloing it, and even that is generous. Even when I flew it regularly (2-3 times a month), landings were always something to take seriously. (Well, they always are, but lets say it was a big relief to get in my 182 to fly home). Now I only fly it every couple of months, I would really not want to land it solo.
Of course you can say, you don't have to fly a Pitts to fly acro. But if your experience of acro has been in a Pitts, you will find an Aerobat or Citabria VERY tame, I promise you. The Pitts is an incredible aerobatic machine.