Craigslist Portland has 6 or 8 welders advertised. I have not used any of them and did find minimums ranging from $25 to $300 . The mobile dudes only weld aluminum in their shops, understandable because of the bulky weld equipment. There were two shops coming in at $22 and $25 for the two hole task I understand this to be. Are they good? I don't know. Such resources are sometimes developed through trial and error. I have been seriously burned by the "best" also. The point is that welding is an alternative in the cost tradeoff effort. Forget Al wire welding. A welder told me it is not really appropriate. AC TIG welding is best and what I used to save an auto trans a while back. It should not hurt to discuss these issues as many view and benefit.