If it’s really a cider block wall that should come apart with out a hydrolic breaker. It really depends on whether or not it has a basement that goes below grade then you will have a challenge on your hand and may want to get some prices to sub it out. Buy the time you're done renting a bobcat, Excavator & hammer you're looking at over a grand and if they're going to have to deliver then you looking at more money. But if it doesn't have a basement then rent a decent size medium size mini Excavator with thumbs so you can pick up the blocks and if it is blocks it may or may not have rebar in it. If it's a solid concrete pour then it definitely has rebar In it and you will need a breaker. Large shrubs should pull right out with a long enough chain or bull rope and tie it to the tow hitch on a 3/4 or 1 ton truck and they should come out fairly easy, especially Rhododendrons, they come out with the root ball intact and can usually be transplanted as long as you hook the chain on the base by the ground so it won't snap. Yes on the other hand have a deep taproot and you will need a good start. Azaleas and smaller shrubs like that will pop right out.
I would get numbers but just for the demo and do the disposal yourself if possible.
Good luck. If your in Massachusetts hit me up.