There many ways to make a stand for a portable band saw. My way is very simple. It uses 10 inch wide plywood and a steel plate from Amazon.
Steel Plate 10" x10" x 1/4: https://amzn.to/39frWec

4 Flute End Mill Cutter: https://amzn.to/2Yb8JUG

The saw is an inexpensive Variable Bandsaw from Harbor Freight: https://www.harborfreight.com/10amp...

Other bandsaw stands from YouTube makers:

Metal stand:    • DIY Stand For Harbor Freight Portaban...  

Two x four bracket:    • Making A Harbor Freight Portable Band...  

Complicated wood bracket:    • Make a  portable band saw stand (VERY...  

Metal:    • Portable BandSaw Stand  

Another metal stand:    • Portable Bandsaw Stand Build  

Made of metal:    • Harbor Freight Portable Band Saw Quic...  

Jimmy Diresta metal rig:    • ✔ DiResta Porta bandsaw Stand  

Adam Savage wood rig:    • Adam Savage Builds a Mini Tabletop Ba...