This is a follow on video to my previous overview Autonomous GPS powered mower. Jump to 2:00 to get right into the details.

Schematics: https://drive.google.com/file/d/1DaLe...

BOM Total $1301 cube orange costs more than 1/2 of that, I had one from a separate project so my build was less than $1000, you may be able to use a much cheaper pixhawk autopilot instead to get the cost below $1k
1 20A Cytron mdd20a dual motor controller (ESC) $36 (https://www.amazon.com/gp/product/B08...)
1 cube orange, 1 here 3+ GPS, 1 900MHz radio $679 (https://irlock.com/collections/combos...)
2 Bemonoc 24V 350W MY1016Z3 electric motor with 9 tooth sprocket $192 (https://www.amazon.com/gp/product/B06...)
1 3s battery $30 (https://www.amazon.com/GOLDBAT2200mA...)
ethernet cable $5
4 utility wheels $120 (https://www.amazon.com/gp/product/B07...)
1/2" rod (axle) $7 (https://www.amazon.com/Forney49359R...)
1 1/8 inside diam pipe $10 (https://www.amazon.com/125WallStee...)
angle iron (bed frame) Free, go to your recycling center/dump or side of road
8 ball bearings $24 (https://www.amazon.com/gp/product/B08...)
Use the outside diameter of this to determine the inside diameter of the steel pipe above
4 bike sprocket $56 (https://www.amazon.com/gp/product/B00...)
4 bike chains $28 (https://www.amazon.com/gp/product/B00...)
bag of washers (1/2" inside diam, 2" outside diam) $14 (20ct) (https://www.amazon.com/StainlessWash...)
You can probably get a better price at your local hardware store
1 bike chain tool (to link up chains) $10 (https://www.amazon.com/gp/product/B01...)
12v wire $5
18 gauge wire $5
car battery $50
Push Mower $30 (Craigslist or FB Marketplace used)