alright, in your user_settings.json you can add this line,
"infinite_inventory" : true
you add it under the line “show hearthling paths: false” so it looks something like this,
“mods” : {
“stonehearth” : {
“default_storage_filter_none” : false,
“enable_cpp_ai” : true,
“enable_speed_three” : true,
“max_citizens” : 40,
“show_hearthling_paths” : false,
“infinite_inventory” : true
}