[GeeTwo]

The "low hanging fruit" of mentors is parents of team members. Make every reasonable effort to include team parents as technical or non-technical mentors.

The next level of effort is to get mentors' employers to be sponsors. In some cases it's just a matter of asking, in others it isn't going to happen. Try.

Ask several times a year if any team members or mentors have any "inside track" on any other possible sources of funding. You never know.

Now, we're mostly down to "cold calls". Try to find a few someones who can take twenty rejections and keep asking, and give each a list. Try to identify tech companies in your city, tech schools, and then companies that may not fit your usual tech definition, but who need qualified technicians, like auto dealerships and auto mechanic shops. You may also want to pursue "supply" stores in your area, including home centers, local Fastenal outlets, and hardware stores. Make it clear that contributions in terms of dollars, parts, and mentorship are all of great value to the team.