OTW wrote: Its UVW is 4,854 lbs. Its GVWR = 7,000 lbs.
Unit on roof is AC. Never seen a generator mounter on a roof they are to heavy.
As for towing you have a couple of options. You need a good "1/2 ton or 3/4 ton" towing platform. This can be a van or a pickup. Since I am partial to Ford I will give some Ford examples but Chevy, GMC and RAM have their versions. The Vans E150, E250 and E350 are all built on the respective pickup truck frames of the F150, F250 and F350's. So if you want a van instead of a pickup you might find a used E250 of E350 passenger van which if you check the numbers might be a deal. Have dealer run vin# to verify the tow capacity and actual spec's of the vehicle. You can have inside storage and tow capacity. Otherwise a newer F150 pickup should handle a 7,000# trailer. WARNING: not all 1/2 tons aka F150's (1500's) are created equal. Looking at the 2017 F150 it varies from 5,000# to 12,000# trailer depending on options. You need to see how each truck is spec'd.
http://assets.forddirect.fordvehicles.com/assets/2017_Ford_F-150_J1/NGBS/Nameplate_SpecificationLiteDoc/Nameplate_SpecificationLiteDoc_136B520B-9CB8-67B4-2AD1-2EC42AD12EC4.pdfOpen the driver's door and there will be a sticker listing the vehicles GVWR. It also will give you the axle ratings and tire pressures and vehicle vin#. GVWR - actual vehicle weight = cargo capacity or how much stuff you can load up in the vehicle. The dealer will also give you a magic calculated version of cargo weight in the owner manual assuming a 150# driver and a stripped down version of the vehicle for bragging rights for the salesman. The towing capacity should also be listed in the owners manual. Ford also posts there "Towing Guides" online by year. The others do also, but I find them harder to find. You can weigh the vehicle at any truck stop or scrapyard, cost around $10. Reweights on same day are a $1 or use to be.
Now on a trailer there should be a sticker inside the door jamb (also front left corner) with the vin# and a dry weight when it left the manufacture. It's kind of like our wedding day. We'll never weight that again. So if you want a real weight take it to the scale but most people add 500 - 1000#. So your TT probably weights around 6,000# but to be safe we'll go with the max of 7,000# Since you never want to push a tow vehicle to its limits and you probably want to throw some stuff in the back of your truck/van I'd look for a tow vehicle rated for around 9,000# or better.
See there's a piece that the dealers leave out when they brag about towing and that's hitch weight and you touched on this. About 15% of the TT's weight hangs on the back of the truck/van. Now the WDH helps level the truck/van back out but the weight is still there. The reason they like to show boats in the adds are boats look impressive but they have the lowest hitch weight of 10%. SO... they can up the trailer rating. TT's have a large square front and in the fine print there is a disclaimer about 64 sqft of frontal surface area etc.... Bottom line is you will never tow to the magic number the dealer throws out in their advertisements. So like McD's we want to upsize the truck/van for our safety and make life a little more enjoyable.
7,000# TT x 0.15 idea hitch ration = 1,050# hitch weigh This is going to be the driving force in your search. For the car makes this is a truck/van rated for a 10,000# tow rating. They use 10% hitch weight for there tow ratings. Remember that boat in the picture.
Bottom line I walked you to a van or truck with at least a 10,000# tow rating. As for the WDH load bars get a good power tongue jack. Hook up your ball. Use the power jack to lift the TT/truck. Place the bars in place. Then lower the whole thing down allowing the bars to load. Let the jack to the work. Might have to buy a stronger tongue jack , but let it do the work.