Funny topic.
I have to laugh everytime I go by a Cross-fit gym in my neighborhood and hear all these people grunting and groaning and yelling all while lifting big tractor tires and concrete blocks around. I wonder how much they pay for this opportunity?
I can do that for them for free!
One recent project at my duplex: Replacing 2 ground level wood decks with concrete pavers.
Removed old wood structure = 2000 lbs of rotten wood and beams.
Move in bedding sand = 3000 for a trailer load moved into place by hand.
Bring in pavers = 3000 for a trailer load moved into place by hand.
8000lbs per deck, per weekend times two weekends! That's 8 tons of moving cr@p around and all I paid for was materials which improved my property so they are now worth more than I paid for them. Makes me feel in nretty good shape.