I have been building machines and selling plans for 8 years. The plan sets that I sell are drawn from a finished machine that has been tested and improved.
Both machines can be built without expensive specialty tools.
The Backhoe will take about 45 hours to build, materials will cost approximately $1500.00.
The Electric Walk Behind Tractor will take about 50 hours to build, materials will cost approximately $950.00 plus batteries.
The build time will depend on the builders experience. Materials cost is based on all new parts, cost of materials will vary.