We are trying to add a 3rd bathroom where a laundry used to be. The whole back of our home was an add on and slab in grade. There is an existing full bath there already but it is basically straight across from the septic. This new bathroom is a bit farther and we have only about a foot of depth from the bathroom to where it would tie into the septic. Is this enough drop for a toilet, shower and sink?

If not I know there is the Saniflo options but not sure the cost of this type of thing or if you have one system for the whole bathroom or what.

I know there is also a thing you can bury in the ground that can work but also no idea on cost.