Towing with Ford Explorer Sport

[truesdac]

I have never towed a TT but my wife has some experience from a previous marriage. I am interested in getting a TM 2720SL or 3124KS, which tow at 20' and 24'. The only potential tow vehicle we presently have is a Ford Explorer Sport 2 Door. My wife has doubts about using this since it has a short wheelbase and all of the TMs are over 20'. We have a book that states we need 110' wheelbase to safely tow a 20' trailer. The specs for the Explorer (from the owners manual and sales info):
2001 Ford Explorer Sport
4.0L V-6 OHC, 210 hp, 238 ft-lbs torque
3.73 limited slip differential
101.8" Wheelbase
Maximum Towing Capacity 5180 lbs (With Class III hitch addition)
Max Frontal Area of trailer 50 sq ft

Questions:

Is this vehicle unsafe due to the short wheelbase (Should we get another tow vehicle or forget it)?

Should I limit my search to the shortest TMs?

Will the Explorer be underpowered for a fully loaded 4000 - 4300 lb TM?

What will I need in addition to the Class III hitch, 7-pin connector and wiring?

Thanks for any responses.

Charlie