I have been working on a couple different toy robot conversions but would also like to start on a household robot that will actually do some useful chores. I ran across an old plastic kitty igloo out in the garden shed. It is around 2 foot tall and around 18 inches in diameter. I'm considering using some electric scooter motors and 12 or 24 volt batts. Can anyone suggest some good motors for such an application? I'd guesstimate a payload of around 15 to 20 lbs. I'm thinking an onboard vaccumm cleaner. A NOAA weather alert radio. An arm that could lift around 5 lbs. With a reach capability of say 4 feet. ( ideally be capable of opening the fridge door and bring me a cold adult beverage! It would also be great if I could send it out to the mailbox to get my mail.Any suggestions for a strong arm? I' ll post a pic of the kitty igloo soon so you all can see what I'm working with.