I have a few home-made obstacles for Autumn. I have them low to the ground since her back is bad and she can't jump much. I have a jump made from 3-foot wood dowels, two on each side and one going across, you could even put nails in different spots for different heights. I have a small hula hoop(tire) that I hold up with a metal tent stake. For weave poles you can just stick 3-foot wooden rods in the ground and they are only about a dollar each. I have a small tunnel from the toy section of Shopko, its about 6 feet long and cost around $10. I haven't made an a frame or dog walk or anything fancy but it doesn't look that hard if I had some planks. Since I just do this for fun I don't plan to spend much money on fancy equipment either, Autumn doesn't mind.