Some car enthusiasts do have fully equipped workshops, but for the rest of us, a combination of pairs of ramps, trolley jacks, axle stands, chainblocks off the garage roof and various homemade "special" tools generally get the job done, albeit slower, harder and more uncomfortable.
Pressing bushes in with a vice or sockets and screwed rod rather than a hydraulic press.
Lots of similar things.
Many people can download the software and do the design themselves or know a friend who can. Their own time for designing and transporting is again "free" and there are plenty of places online where you can upload your design for printing and dispatch. Although, yes, this would be beyond many people and they'd have to pay for it all.
SteveW