Wow, HMF speaks really well on the subject!
I would advise against weed. I've seen it be detrimental to reboots on here, and I've never seen it be helpful, except MAYBE as a crutch here and there. If you're using it for sleep, there are lots of better ways to get better sleep. According to a guy who was recently plugging a book about sleep, weed is like alcohol in that it helps you pass out, but compromises the quality of sleep so much that it does more harm to your sleep cycle than good.
My thought when I see porn addictions with things that start before porn is that a therapist can be a good call, finances/insurance permitting. Given that it is politically charged, perhaps HMF has thoughts on it. Maybe most of them won't touch it with a 100 foot pole, who knows.
I never had tangible objects that needed to be purged, just masses of porn on my computer. It really doesn't help to have it sitting there, because it means somewhere in the back of your head you're telling yourself not only that you will relapse, but you want the relapse to be really intense. For example, if I knew I was going to relapse and look at porn fairly regularly until finally breaking free that is just a certain amount of realism, but if I kept my pile of porn, then I was saying to myself "I want my finely curated collection to fall back into, not just whatever I can find online". It is a different level of attachment, and I'd even say a love, of your collection. Honestly, one thing that helped me in the last months of my addiction was that I didn't always find the most stimulating porn stuff, and if I had my fall back stuff downloaded onto my hard drive I would have always had a base "quality level" (if you can call it that) and the pmo sessions would have been more stimulating. The particular fetish that I struggled with (pregnant women) goes through phases of feast or famine on many of the websites, especially camsites, for obvious reasons.
Lucky for me as I was really getting into the swing of my reboot, there was a real dry spell of what was out there and that helped a lot. That wouldn't have been the case if I had hoarded. I'd always have something good to day dream about while at work, and the "hit" was always more intense. I'm not sure if any of this translates well to the clothing collection, but hopefully it is at least helpful.
You're right that this won't be easy or quick, but you can also tell yourself that it will be the best thing you'll ever do. Stick around here. Everyone benefits when people with a lot to say are willing to share their struggles, especially when they are as articulate as you guys are.