Board Walk

I need three boardwalk type elements:
1: Extending from a lake bank into the lake, running alongside a narrow spit of land with a small number of trees on it. Approx 22 meters long, 1. 2 meters wide, stepped down by 2 150 mm steps along the length (approx 15 meters from the start of the boardwalk). Needs to have one or two people on it for scale.
2: Slipway extending into a lake from the shore, with a road leading to it and a turning area adjacent to the slipway. Needs to have a rowing boat on a trailer for scale and grass banked shore. Approx 8 meters long and appropriately angled approx 7deg.
3: Canoe steps leading down to the river. I can provide engineering drawings for this. Include people for scale.
Require full draft for Tuesday and I need to be able to view in solidworks or some other software that allows me to select viewing angles etc.
Thanks