Celebration of life at my grandpa's farm this Saturday, about 80 people. Our septic can't take that. One unit or two?
My grandpa passed last week and the family wants to do the celebration of life out at his farm this Saturday afternoon. We're expecting around 80 people, a lot of them older, from about 1 to 6 with food and coffee in the machine shed. The house is on an old septic system and my uncle is pretty sure it won't handle that many flushes in one afternoon, so we want to keep people out of the house bathroom.
I've never rented one of these before. Is a single standard unit going to cut it for five hours, or should I get two? A few of grandpa's friends use canes and one uses a wheelchair, so I'm wondering if one of them should be an ADA unit. The yard is mostly flat grass next to the gravel drive. Also is three days enough notice or am I too late?