Well Jim our friend just doesnt seem to get it...When he doesnt get his way he likes to call names...Its been that way for years..He must be related to Plowboy on Newagtalk..
I guess if he had bought a new 4020 JD in the 1960's he would have only pulled a 3 bottom plow with it because a 5 bottom plow would have maxed it out...There must have been (50) 4020's in my area and they all pulled 5x16's...Even the 3020's pulled 4x16's and the 2510;s pulled 4x14's...Yes,our soil is sandy and doesnt pull hard.
Its perfectly legal to haul a 4000-4500 lb tractor or load of any kind on a 7K trailer pulled by a 1/2 ton pickup..Its probably the most popular combination that I see...Many years ago I towed with a F-100 Ford with a 3/4 ton rear,heavy springs,and bigger tires...It did really nice..
If a nicely built 7k trailer weighs 2200 and the tractor weighs 4000-4500 then he has 300 to 800 lbs to spare..Every once in awhile I'm that close on my 14K trailer...In fact just recently I was some over that for a 7 mile haul..
A 16 ft trailer isnt as maxed out as a 3/4 ton pulling a 25 ft 14K gooseneck with a 9-10,000 lb tractor on it or a dually pulling a huge tandem axle trailer with 18,000 on it..I see that all the time..You seldom see anyone only using half the capacity..
I have a friend that is a new trailer dealer and he probably sells (5) 16 ft bumper hitch trailers to every one of any other size..His trailers are very nicely built..If you want to go up in size he will gladly take your older trailer in trade as he can quickly sell all the used ones he can get..
The guy asked what it would take to haul a 4500 lb tractor and he was given plenty of answers..If thats all he ever intends to haul a 7K trailer will do fine..If not he can always trade up..Thats what I did..I have way more truck and trailer than I need 90% of the time but I occasionally haul some pretty big loads.