We have 3 lockers and go to WDW about 4 times a year. I have divided our stuff so that things I only need for cold weather are in one locker, so sometimes we only have 2 delivered. We always have a car but I am on vacation and the convenience of drop off and delivery and knowing that someone else is responsible for keeping my stuff safe in a climate controlled place is worth a lot to me. I have not done the math but to me the extra work involved in a rental unit (including finding reliable people to share) would not be worth saving a few bucks (and I don't even know if it would save). But I applaud those of you who are not as lazy as I am, I guess!