it is pretty easy to find carpentry work on the road, use craigslist to advertise your business. But you can also use it to find short term jobs.
In addition carpentry is one of the skills that the short term labor employment companies market. Quite a few of those companies have local offices in many areas of the country. So if your husband submitted his resume and was willing to travel he very well could have work lined up in advance in places you would like to travel to. This type of temp labor work via a national employment agency is done by a number of nomadics such as traveling nurses, electricians, plumbers, computer and cell technology and other skilled labor trades. Good help is hard to find!