اَلسَلامُ عَلَيْكُم وَرَحْمَةُ اَللهِ وَبَرَكاتُهُ All of my lower garments are below ankle size. But I fold it to keep them above the ankles all the time, even during salah. And i cant do alteration right now, as its expensive where I live.

Ustadh AbdulAziz al-Haqqan
Then you have no other choice. Can't you learn or a family member who knows how to shorten cloths do it for you?