I'm considering purchasing an old farm property. uses would be part-time residence, part-time airb&b, part-time wedding venue. there's a barn and 4,000ish sq' house. barn would have mens/ women's bathrooms containing one urinal & 3 stalls and dual sinks in both. maybe additional plumbing for the bar. house will have 2 full baths 2nd fl, 1-2 half baths 1st fl, 1 full bath basement. plus a larger than usual kitchen for larger groups. barn is 150ish' from house and a few feet lower. so here's the question. ........... what's the chances of having both on the same system? 150' is a long way to go to reach the tank. could i do one tank(say 3k gals) and one leach field or two tanks and one field? i REALLY don't want two separate systems! keep in mind both buildings won't be heavily used at the same time.