[Terretta]

Little known, you can do wireless extending (main + one hop end nodes + clients) or WDS mesh (main + one hop relay + one hop end nodes + clients) with Airport:

Overview : https://support.apple.com/en-us/HT202076

Extending: https://support.apple.com/en-us/HT204617

WDS: http://support.apple.com/kb/HT4262

While the wireless distribution mode drops speed (as does Ubiquiti etc.) it's still faster than a DoCIS 3 cable modem, and the Airport Express for end nodes is cheap.