You might want to read up on the Soldering Stainless Steel
thread. I've never soldered copper or SS for that matter, and I think mine turned out great. I read through 90% of the thread and picked up tips and tricks (the dimple tool made soldering so much easier) along the way.
Here's a pic of my 3rd attempt at soldering SS. It's a 1/2" full coupler for my drain valve on a keg:
Of course soldering isn't as strong as welding, and if you don't have ANY of the tools required to solder, such as a respirator, acid brush, silver or lead free plumbers solder, stainless flux, and so on, having a guy you know weld a couple fittings might be a cheaper option. The cheapest option would be buying your weldless fittings (at bargainfittings.com I might add).
I originally went the weldless route for my boil kettle. It was great, but when I decided to go all grain I was planning on taking my 2 new kegs to a welder with a friend who also needed a few kegs welded. Then I stumbled on the Soldering Stainless thread. The great thing is that all the holes I drilled for weldless seamlessly worked for the dimple tool soldering application.