The RNG timer does suck. Plots should go into a timer status after demo or release but the plots shouldn't be shown as available in my opinion. They should randomly pop onto the market after the timer expires and be ready for sale. That would prevent the camping and the needless sitting at the placard clicking for hours. I know I just did that on Balmung and was lucky enough to get a small for my new FC.
It's certainly not a fun experience and not for everyone. Even being persistent doesn't guarantee getting it and only builds resentment in my view.