[wingnut60]

I was lucky enough back in '07 to find an '05 Mobile Suites for $45k--so those deals are still out there if you spend enough time looking. But a 2500 is not suitable to tow one of these.
A Jayco, Excel or HitchHiker are good names to look for--Excel no longer makes units, but they are well built. You kind of need to define 'full-size refrigerator'--you won't find many large fridges unless you are looking at 36' and longer. Room for a W/D also dictates more length.
If you considered upgrading the truck, it would give you more options, to be able to tow more pin weight.
Doing contract work, you surely will need the interior space of a 36' minimum fiver.
Have you looked around yet? Start looking at RVTrader.com/craigslist.com and others to get a feel for what floorplans are offered. If you are anywhere near Texas, PPLmotorhome.com has many used consignment units to look at.
Good luck in your search.
Joe