Yes, don't guess it is a bad idea to begin with something (system) that is not so valuable and then buy better later after learning to adjust the system. However that idea can have short-comings when dealing with things like motherboards. The good boards are almost night and day different from their lesser counterparts.
I had not gotten a new motherboard in about 3 years when I bought one to use with the newer AMD FX processors. I had not seen the cpu and knew they ran h0t and required a lot of power from the VRM circuit to run fast. I did not buy a practice board. It would have been a mistake since the board would have severly limited my fun and could even have killed itself trying to keep up with my testing for outright speed.
I was not really thinking about the cost of the board you were using now, but rather thinking to the 'next' board and that it should be much better than entry level, since the better boards do in fact work better on the order of 90% of the time and is not the limiting factor in an overclock.
Good luck to you man.
RGone...