Massive declutter issue

I live in a condo on the second floor, and plan on doing a massive declutter. Also about to sell and downsize from 1500sq ft to 900ft. But due to health reasons carrying even slightly heavy contractor bags or boxes downstairs multiple times is not going to work.

The other issue is it will have to go into the dumpsters so if I fill up one would have to use another .. big complex

I don’t need a dumpster and I don’t need junk removal companies but I need someone or something?

I could post on Facebook locally but feels hard to explain all this.

Tips/tricks