Fundraising is a good way to sustain your team over many years.
FIRST: Fundraising Resources
https://www.firstinspires.org/resource-library/ftc/fundraising-resources
https://www.firstinspires.org/resource-library/ftc/fundraising-resources
FIRST: Fundraising Guide .pdf
https://www.firstinspires.org/sites/default/files/uploads/resource_library/ftc/2016-2017-season/ftc-fundraising-guide.pdf
https://www.firstinspires.org/sites/default/files/uploads/resource_library/ftc/2016-2017-season/ftc-fundraising-guide.pdf