I am exploring cutting a 36"x36" hole through the 8" concrete slab in my
kitchen to access a sewer line for repair.

Called a few concrete contractors and one told me he will use a jackhammer
to punch the hole (cost $300) and the other told me he will use a saw (cost
$500). The jackhammer will probably spray dust in all directions and shake
loose some copper pipes in walls. The saw will make a clean cut according
to the contractor but he told me "imagine starting a motor cycle immersed in
a mud puddle"...this does not sound promising. Is there a way to do this to
minimize dust and mess? I am willing to pay a bit more for a cleaner
procedure.

Also, if they use a saw, does it mean it is a big mean machine they will
move from my door to the kitchen and along the way it may scratch the tiles
along it's path?

Thanks,

MC