Im a past owner of a hot dog cart the bbq of my choice was BROIL KING
Heavy duty cast iron grids .Unit maintained heat for 12 hour days .Solid made and dependable. I own a signet Lp with side and rear burners .I cant say anything bad i love it all I grill roasts chickens ribs as well as the usual burgers and dogs .Would never buy nothing but broil king 
Im 500% satisfied