I agree , Harbor Freight , 1.5 or 2 ton aluminum jacks , the 1.5 is a little smaller to carry in car & will do the job but the 2 ton is a little better.
I have had the 1.5 ton b4 now I have the 2 ton , but I change my tires at home not at track.
You can get the 1.5 on sale for $60. & the 2 ton is $120.