I love tinkering, a Rubbermaid tote or cooler and one of those rods https://smile.amazon.com/dp/B00D1WYY9C/ref=cm_sw_r_cp_apa_fabc_APYK4646GX454J2RM66K is going to be my build I think.
Right now I have a tote I made a gasket for with silicone and a half pound of silica in it.. I added a hygrometer to it eventually one of those dehumidifiers.
Let us know how your project goes
https://www.amazon.com/dp/B00D1WYY9C/ref=cm_sw_em_r_mt_dp_RHuwFbZ6FY9NV
This works well if you can easily get power inside the cabinet