A convertible, modular trailer includes a flatbed base including at least two wheels, a trailer tongue, and a plurality of attachment channels. The plurality of attachment channels have respective openings with a cross-section adapted to a particular coupling geometry to couple the flatbed base to various modules. The various modules include: a detachable tub component including a set of tub couplings on a bottom surface of the detachable tub component, where the set of tub couplings have the particular coupling geometry, and a detachable tower component including a horizontal bridge support, at least one upright support leg, and a tower coupling at the base of the upright support leg, where the tower coupling has the particular coupling geometry.