I can lend my 2 cents..
I bought a Campbell-Hausfeld Mig welder off of ebay for 235 bucks with shipping. It took me about a month to get the basics down from sheetmetal to 3/16" thk. plate. I've replaced the front driver and passenger floor pans, the cowls vents, shaved the driprails, and am currently working on the rear quarters. I promise you, you won't regret buying one. You may regret farming it out if they do a crappy job that you have to redo later. I've been welding for about 3 months now and check out the fruits of my labor. I built this in about a months time and this project alone has paid for the welder and then some. (Hint: It's the rotisserie)
I little cash extra up front is worth it in the long run,