An organization I help with operates in a large warehouse. Their network consists of a Clearwire modem hooked up to a consumer wireless router upstairs. Most people upstairs connect via secure wifi. One person has an ethernet line. Another ethernet line goes out through the rafters about 200 ft and connects to another consumer router downstairs. About 10 users at a time might connect to this router wirelessly. One of the ethernet ports on this router is connected to one more router about 100 ft away, and about 100 users at a time might try to connect to this router.
Lately their network has been pretty flaky and I'm sure their network architecture is mostly to blame. Ideally I'd have them hire somebody to rewire the whole building to allow for a central hub, but budget constraints are budget constraints. Are there any reliable ways of chaining network devices without significantly disturbing the existing ethernet wiring throughout the building?