Last year I looked into submetering water for a 24 unit I own in the neighboring town, Winston Salem. Details are a bit fuzzy but I'll share what I recollect. I spoke to my property manager who helped me get a quote - and then she talked me out of it. First, the installation quote was higher than expected because labor costs were high - commercial plumbers are licensed and in short supply - and also the existing plumbing of each unit had to be brought up to code (so if you have an older property expect extra costs), and finally walls had to be repaired and repainted. Then the property manager noted that there's no process for enforcing payment, unlike rent in which nonpayment can lead to eviction. Finally I understand one has to get approval from the NC Utilities Commission to submeter which may be a straightforward administrative process but extra effort nonetheless. On the flip side, she said that, at least for my market, being able to promote to tenants that water is included in the rent as a selling point. All in all, I thought for now submetering wasn't going to offer a quick or high payoff. Perhaps in a few years if and when the property improves I'll take another look. There is a company in NC that makes the submeters; if you want to talk to them let me know and I'll find their contact information. Hope that is useful information.