Don't know where you are, or where you would put your composter. Some people prefer a base. Not me. Sure, my compost will enrich the surrounding soil and the substrate, but I like the cooperative effort of flora and fauna with the environment to break everything down. Not so great if you want to control all aspects of it, like temperature and green to brown ratio and aeration.
Generally, pick an area for the composters that is convenient to you and your contributions to the pile, but not too close to your house or someone else's. If you have a paved surface available use it with the caution that composting there may damage and stain that area. But it would also kill any grass and some tree and shrub roots under it.