A modular solution mining method may include the steps of: providing an injection wellbore, the injection wellbore including a horizontal injection portion, in which the horizontal injection portion includes a toe end and heel end; providing a production wellbore, in which the production wellbore includes a horizontal production portion that is proximate to the toe end; injecting a solvent into the horizontal injection portion; generating a turbulent solvent flow proximate to the toe end to generate a mineral solution and an initial cavern proximate to the horizontal production portion; and motivating the mineral solution from the initial cavern, into the horizontal production portion, and to a surface location. Optionally, the method may include the step of repositioning the turbulent solvent flow to be closer to heel ends to generate mineral solution and subsequent caverns further from horizontal production wellbore.