When enough is enough

I (33f) have a new bf (33m) and he’s the most non-judgmental being I’ve ever come across. I told him in the beginning that I suffer from hoarding. And he didn’t flinch or bat an eyelash. I took him to my storage unit a couple weeks ago and no judgment still. He’s so wonderful. But now my unit has gone up to $302 a month and I just cannot afford it. So I’m going to try to find a cheaper storage place and also we’re together going to go through things. I hope I can do this. I have a feeling I’m going to flip out. Idk how to start this. We decided to start with four boxes; 1. Keep 2. Donate 3. Sell 4. Trash. Is this the right way to try to go about this? Any advice will help. Thanks in advance.