I live in a neighborhood where it is difficult to find a Keilim mikva. Are there any designs available for how to build one? Is it as hard to build as a human mikva?
Another possibility might just be to use a local pond or lake. (Rivers or streams are a possibility too, but there are more halachic issues with those, involving issues of how much groundwater vs. rainwater they contain.) Those generally aren't usable for human mikvaos because of the lack of privacy, but that wouldn't apply to dishes.