I know you're low on cash, but my advice is to get a wall shelf if possible. They're about $150 new and the difference in isolation is huge. My dog jumps down off the couch and the record doesn't skip. You're going to tear your hair out and spend as much on blocks and other things that won't work. The cheapest way is to do it right the first time. Either that or get some very soft shoes.
Myrtle wood under TT
I have an acoustic Signiture Final tool TT. It sits on a Billy Bags stand. (Not a dedicated TT stand) I can bump the table just a little and the virations travel to the TT. Will 3 myrtle wood blocks help. I am low on cash. Mike