Would this be a manicured lawn with tons of shrubs/flowers ect? If so, 0-turns are OUT. They rut the turf terribly. Can drive through any neighborhood and tell what kind of mower was used.
Also 0-turns require you to run over the turf, packing the soil down, about 14 times when the grass is tall.
I agree with Bert. For 1.5 acres, don't need a huge 1500lb 0-turn. Add 2-300 more lbs for the human on board.
I would look for an older,
better built, Snapper, SCAG or Deere walk behind. A 42" with BELT DRIVE is plenty. Forget all the hydro nonsense. Belts are way cheaper to maintain. Just wait till your hydros go out $$$$. Some of those hydro synthetic fluids are crazy expensive.
Like this one below.