sewage ejector load/max usage question

Hi - Working on a plan for a basement bath project with a cieling height of 6+ feet. The desire is to lower the slab and make the bathroom height closer to 8 feet, but to do that I'd need to lower the entire sewer line...or I could use a sewage ejector - right?

My question is how much volume (in both wastewater as well as repeated usage) can some of the Little Giant products handle? We're talking a 'full' bath with tub, shower, toilet and sink. It would be used occaisionally (maybe once/twice a week) for the tub, the toilet likely once/twice per DAY.

Thanks, Matt