I get your point but not many have the tools or strength to be manhandling or busting beads on rear tractor tires. I suppose with experience one could change out or add a tube with the wheel still mounted but I don't cherish the idea of dealing with a several hundred pound rolling object.:laughing:
tools are minimal.. or CAN be.. at a minimum.. you really want 2 spoons, a 3rd helps, and / or spooons of other shapes to deal with different rims and tire beads.
for smaller tires, things like c-clamps can pop beads off rims.. for larger tires, things like yer farm truck rolling over the tire can pop beads off rims..

gotta be creative.
vegi soap, or as FWJ stated, regular dish soap is the preferred lube for rubber on rims.. if you want fancy.. some stores make a ru-glyde rubber lube ( soap based )..
a real tire hammer is nice.. but a sledge will do in a pinch.
thus about 30$ of tools are the MINIMUM you need to start, and up that to 100$ and you got the stuff to do fronts all the way to rears.. harbor freight has a front tire changer rig that drops to 49$ now and then..
as for weight / strength.. again be creative / smarter than the tire

a 8' 2x4 on a short fulcrum can move an 800# tire.
I do all my own so far.. that includes loaded beefy 16.9-24 rears.. which by the way.. the water loading alone weighs 510#, kick in another couple hundred easy for the rim and tire casing.. maybee more like 250#.. then the ballast.. and you have 800# right there...
I weight 130# and am 5'6 in cowboy boots.. and just got over a heart condition..
soundguy