I was about to start building a solar kiln earlier this year, but never got it started. I had made a list of materials with prices on March 25th, 2022 that I ran across. This is how the prices compare to today (9/21/2022). Both old and new prices are from Lowe's.
2x4x8' framing lumber was $7.98 now $3.98
2x4x10' framing lumber was $13.98 now $7.98
2x4x12' framing lumber was $16.92 now $9.92
2x8x8' pressure treated was $16.88 now $9.98
2x8x12' pressure treated was $25.18 now $16.47
4x4x8' pressure treated was $16.98 now $11.48
23/32" 4x8 CDX PT plywood was $74.48 now $57.68
2x4x8' framing lumber was $7.98 now $3.98
2x4x10' framing lumber was $13.98 now $7.98
2x4x12' framing lumber was $16.92 now $9.92
2x8x8' pressure treated was $16.88 now $9.98
2x8x12' pressure treated was $25.18 now $16.47
4x4x8' pressure treated was $16.98 now $11.48
23/32" 4x8 CDX PT plywood was $74.48 now $57.68