You can easily complete the Warehouse with green equipment, as proved by thousands of players. We recommend you to learn the game mechanics and balance better, there is no location, quest or enemy which can't be done without payments.
Last year diffenet locations were introduced into the game — the Hope Farm, the Copse, the Vultures’ Lair and the Pumping Station. Also the disassembly workbench was released recently. We'd advice you to learn the game updates better.