Manufacturer - Doubletree RV (DRV)
Model ------------- Elite Suites 36SB3 (Doubletree's Top of the line model)  These 5th wheelers are true 4 season RVs with 3.25" exterior walls and extra insulation throughtout. All windows are double pane. The roofs are fiberglass. Basements have slide out floors. All steel I-beam super structures.                           
Upgrades and features -
55" and 40" Samsung Smart TVs. Outside TV ready
TOYO M1450 235/175R17.5 143/141J Tires 2018 (Japanese) 1500 miles
30/50 AMP Surge Guard Power Protection at entry
Granite Counter Tops
King size bed with adjustable tilt headboard
Air Ride King Pin
Winegard Direct TV automatic satellite dish with DVR 
Winegard motorized Local TV Antenna
Double wide Refrigerator with automatic ice maker
Non Smokers
3 Fantastic Fans (2 with remote controls)
Dual Quite Air Conditioners (living room replaced 2018)
Disc Brakes
New 18' power acrylic awning and an additional 16' Awning 
Four 6 volt batteries with easy fill systems and were replaced in 2019
Electric Fireplace 
Carbon monoxide/ propane gas detector
EEZRV Tire Pressure & Temperature Monitoring System (upgradable to 10 tires)
Between tires chocking devices
Trailer-aid flat tire lifts
Heated water hose with pressure regulator

NADA GUIDES List Price Retail (nadaguides.com/RVs/2007/Doubletree-RV/M-36SB3/4093740)
Base Price         Low -$27,800 Average - $33,500
Options
15,000 BTU Central/Ducted $275
Furnace (30,000-35,000 BTU) $120
Central Vacuum Cleaner $75
Dryer $170
Microwave/Convection Combo $55
Refrigerator 8 - 10.0 cu. ft. $310
Washing Machine $185
Water Heater 10 Gallon Gas/Elec. w/DSI $115
50" Flat Screen With HD $145
Satellite System With Auto Seek $335
Electrical Rear Leveling $125
Front Power Leveling Jacks $70
Ceiling Fans $40 (Bedroom fan also)
Fiberglass Exterior 31' and Over $675
Full Body Paint $1,735
Hitch Stablizer $240
Power Roof Vent $55
Shower Enclosure (Glass) $60
Skylight $70
Tile Upgrade (Bathroom/Kitchen) $135
Power Awning 16-21' (Each) $170
Slide-Out Awning 10'-11.5' $100
Slide-Out Awning 12'-13.5' $115
Slide-Out Awning 14'-16' $125
Cabinetry Upgrade (Deluxe) $645
Inverter (3000 Watt) $450
Storm Windows (All) $105
Power Slide-Out Room (Bedroom) (Each) $450
Power Slide-Out Room 14' (Each) $965
Power Slide-Out Room 16' (Each) $1,015
Total Price Low-$35,385 Average-$42,630
April 2020 a complete Inspection with repairs by Wolsky RV. Inspection and work report provided on request. https://www.wolskerv.com