Karin, keep scout troops and volunteer organizations and church groups in mind, too, for garden help. Badges, and community service hours, and such can be earned pretty quickly in a garden.
There are a few young men at my office who all started with us out of high school. A couple are getting close to COLLEGE graduation, now, which just throws me everytime I think about it.
I have had arrangements with a few where I would pay for text books or--these were teenager boys, remember--traffic citations.
They would exchange for labor at my home at one hour of work for every $10 paid on their behalf. A couple still come help just because they are good guys--these two.
Hopefully, an option like one of these will be workable in your new home.