Call around to local warehouses and speak directly to the owner or decision maker and give them your proposal to. If that doesn’t work and you are a member of a local church see if you can gather enough money each month from parishoners to pay for the warehouse. Even if you are not a member you still may be able to get help from them. Same goes for equipment, place ads with local churches, post offices, stores, etc. specifying what you kinds of equipment you need donated.
Good luck!

use your basement