The tub has to be vented and trapped, so unless you mount it on a platform, you'll have to cut concrete. The vent may be another potential pain to install, just depends on what is there now. You need 1/4" per foot drop from the tub drain to the stack. Does the stack exit from the house below the basement floor or through the wall above the floor? If above the floor, you'd need an ejector pump, if below the floor, you may not, but it is possible you might.