PVC cucumber / tomato / strawberry trellis doubles as playhouse …
Vertical Gardening. This looks relatively simple and affordable. If it wider you could plant tomatoes in the middle - they could be protected agains the southern heat.
Projects to Try
Cucumber trellis. Growing a small garden is on my list this year!
DIY trellis for cucumbers, squash, zucchinni, etc
Homemade Garden Trellis Ideas | Vertical Gardening: Teepee Trellis
Trellises for Summer Squash, Winter Squash, Zucchini | Outdoor Areas