Off the car is not as big a problem for sure but getting it off can be a problem without the proper tools. In the rust belt, a smoke wrench ( oxy-acetylene torch), air hammer (smaller ones work ok for most things), cobalt drill bits, good quality taps and dies are mandatory or else you can get yourself in a bind not being able to get it fully apart or back together.
For DIY guys something like this smaller torch set can make life a lot easier, I cant recommend any specific one, commercial ones use bigger bottles but basically the same just a different bottle size. Airgas will refill (exchange) the cylinders when needed.