I completely endorse the use of adequate jack stands and wheel chalks. There is a pic here somewhere a guy has his Rado up on all four points with OE bottle jacks, just to paint his brake calipers.
OMG, don't be that guy.
Im a guy who like to do my own rotations and whatever else I can. A few years a go, I could sling a 3 Ton floor jack around like it was nothing. But today, its a lot harder and Im worn out just from the lifting and lowering process. I'm considering alternatives, some of which you might look at.
There is a 3.5 ton scissor jack by GM that is very strong. It came in the 1996-2002 1/2, 3/4, 1 ton Suburban, Express, Savana, K/C1500, K/C2500, K/C3500 and Gen 1 HUMMER. One GM Part number I know of is 1571-5517.
These jacks, although should be used in conjunction with stands, are about as robust as you will find. I will add that on the side of the road, are FAR better than the CRAP BOTTLE JACK WE HAVE.
So far, my plan is to get four of these, two HUMMERS for the fronts, two K/Cs for the rear and drill motor drive adapters for all.
A cautionary note, I don't know if all the scissor jacks of this type (1571-5517) are identical in height and rating.
Before you buy something to use for a flat, know the "flat tire height" under your axle, A-arm, frame, etc. A lot of heavy dooty stuff available for bigger trucks may not fit.