Assuming you're rigging this inside...
What is the BTU output on that baby? If its over 90k that's not a bad option. I believe most of the outdoor cookers can be converted to NG, but they are "outdoor cookers." Potentially you could use a blichman burner or a banjo burner - but they wouldn't be as contained (read: safe) as what you posted.
Your other option is a brew stand, but most of those are three burner and well over 2k.
Whatever you do, make sure your plumber signs off that it is up to code, as does the HVAC guy who puts in your hood. Also invest in a few high quality CO detectors!
In short, looks great - very jealous!