Toy hauler tongue weight

Thanks to all for your replies. otrfun, I do have the 5.7 with towing package, but you (and others) bring up some very good points. I have always wanted a diesel pusher and had planned to go this route in about 3 years but I thought this Toy Hauler to be an interim option --if-- I didn't have to invest the money in a new truck. Alternatively, I could just go ahead now and buy a used (2002-2005) diesel pusher coach a tow a stacker trailer. I figure that if I have to buy a new truck, along with the Toy Hauler I might as well get in a used diesel pusher and stacker now for about the same $$.