What is your advice when it comes to long term storage and packaging ready for shipment? What storage methods to use, and where to get them cheaply, as well as the cheap but refined-feeling packaging methods.
You can get storage shelves at a local hardware store. I’ve taken these to shows and used them at shows and at home.
For packaging poly mailers are always popular because they are lightweight, tyvek has a different isn’t as shiny and has a better feel to them. You can always add a sticker to the mailer or use a stamp to create something unique. Check out uline or amazon
Also you can use plastic packaging to store your shirts until shipping.