Bro, you've got a tough call to make.
$5K will get you a variety of cookers, but a lot depends on how much volume you need as well as how you want to cook.
I got my Kingfisher rotisserie stick-burner for under $5K delivered to FL. You can also get a FEC100 for under $5K. The large Spicewine falls into that category.
If you need mobility with a cooker on its own trailer or axle, well things get more problematic.
Check out Spice's site for an idea or two.
Also look at http://www.kck.com/kingfisher_kookers_specials
for Kingfisher cookers - Bob treated me right when I ordered mine.
Also look at http://brittsbarbecue.com/html/jack_...h_cookers.html
for additional ideas.
The Lang cookers give a lot of volume and portability.
Most fabricators can put any of their cookers on an axle or trailer.