Are DIY spray foam insulation kits a viable option?
DIY Closed Cell Spray Foam Kit | Spray Foam Systems
Low GWP Spray Foam Insulation Kit, Dow Froth Pak 650
Vega Bond Purplecoat Single Component Closed Cell Spray Foam Insulation Kit-240 Board Feet Coverage at 1 inch thickness (12-Packs with Gun and Cleaner) - Walmart.com
Spray Foam Insulation Kit | Spray Foam Systems
DIY Spray Foam Insulation - What You Need to know Before You Start - YouTube