For years my 4x5 developing tank was a gutted car battery! Hangers fit perfectly. A wire streched with a turnbuckle and threaded with plastic clothes pins makes a great film drying setup. Surplus ammo boxes make good field storage for cameras if they are lined with sponge. Eckoware baking dishes, glass or non-stick make suitable developing trays. A small trash can (plastic) can be fitted with hoses and drains with PVC and silastic caulk to become a washer. Get the name and address of a theater supply store. Good source for colored gel material and used theater lights. You might find a book on building scenery. The same technique is used for screens. Easily painted with a graden spray to have depth and modulation by using the same idea as an ink jet. For extra cash that does not appear in the budget. Copy and retouch heirloom photos. Very possible with modern tools.