Welding and acquiring any equipment can be a huge money saving point if you're looking to continue competing (or foolishly disregarding the addictive nature of this). Like Doctawife, I did get a welder and got up to speed for doing a cage. But, it's no easy task making good welds upside down and around a joint, if you're not up to practicing and grinding out to try again. You can offset the cost of the welder for what you'd pay someone else, especially if you watch craigslist for a while.
While I find a few more people to do a new team, I plan on making a tube bender to do the custom DOM bends instead of the ERW kits (it helps to have a brother that's a machinist and will make a die). Again, it'll cut down the other costs.
FWIW, we got to Houston for ~$3250 (excluding tools I bought, like the welder). It helped finding closeout parts or it'd be more. BUT that was without any real spares. Aaannd, it didn't take long before the engine was damaged and we were hosed. Testing before the race is priceless, and that little extra in spares is worth it.
Hope you have plenty of team help. That seems to make the experience more positive.
Plain Jane '86 BMW 535i - Current
RIP People's Elbowed Protege - 2010