Ubyaman,
Welcome to JOF
The 730lb as you mentioned is a "published" 25FK dry tongue weight, but isn't reflective of what your "loaded" tongue weight may be. Also, the published UVW of 5,750lbs isn't reflective of the actual "as-shipped" UVW that will be noted on the yellow sticker on the side of your TT.
We all have different loading habits but here is a hypothetical 25FK moderately loaded: (6,100lbs as-shipped UVW from on-line source) + (50lb dealer battery) + (700lbs cargo,
no fluids) = 6,850lbs gross loaded weight.
The 25FK is a 30ft TT thus a loaded tongue weight range of 13% to 15% of gross weight would be desirable......; 6,850lbs = 890lbs (13%) to 1,025lbs (15%). The 25FK loaded to it's GVWR of 7,500lbs = 975lbs to 1,125lbs loaded tongue weight range.
The RV dealership may reference the manufactures standard recommendation of a 10% to 15% for tongue weights, but reality is that a 10% to 12% tongue weight on a 30ft TT isn't desirable in less then ideal towing conditions (wind, sudden maneuvers, etc.). Also, a loaded front kitchen TT w/front pass thru storage will seldom experience a loaded tongue weight in the 10% to 12% range at the CAT scales.
IMO the 800lb rated WDH isn't a good match for the 25FK.
Bob
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2016 GM 2500HD 6.0L/4.10
2018 Jay Flight 24RBS
2002 GM 2500HD 6.0L/4:10 (retired)
2005 Jayco Eagle 278FBS (retired)
1999 Jayco Eagle 246FB (retired)
Reese HP Dual Cam (Strait-Line)