Choosing a Welder Help?

[Jarhead011]

ok, so im gettin ready to purchase a Welder soon. I found a Hobart 210 with the gas tank for 800$. Ive also been lookin at the hobart 140. so, i call up to tractor supply to get some quotes on a gas tank and they range from 250 to 350$. I tell the guy that im gonna be weldin on the frame and body of and old truck and he says i just need a Flux core welder with no gas. is this True? From what ive read the welds arent as strong with the flux core and they are more "dirty". also the hobart 210 will weld 3/8 metal and the flux core will only weld 3/16 metal. Which is the best way to go? i realize that the 210 is the best welder but the flux core would save me alot of money that could be used toward my project. and advice would be much appreciated!! i just dont know alot about the FluxCore thanks.