Sorry, I did not mean to confuse you. I like having a selection of components, so that I can adapt my charging to the given situation. I have the Long extension cord, so that I can run power from upstairs to the garage downstairs. That extension can also be used at RV campsites. I have the Tesla to J1772 adapter so that when I am charging in the wild, I can use Tesla chargers, like at hotels and restaurants. I have a Tesla UMC because I got it for free, and the different plug adapters are only $40. So that gives flexibility for the two dryer type plugs, other RV campground plugs and simple 110v. Some people don't like dragging a lot of stuff around, and I can understand.
Like Anti_Climax said, the one you linked to is only 16 amps, so you will get about 3.6 KWh charging.
If it doesn't have to be 50 feet long, you could get this one :
https://www.amazon.com/Lectron-240V-32- ... B07HKLCXPJ
Which would give you 7.2kWh charging.
If you want compact, but still 240V and 16A charging, you could use this:
Yes, it is that tiny. For 240V operation, it has a NEMA 6-20 adapter.
Whatever you choose, bear in mind that there is not much to a charger or EVSE. If you were to open one up, you would feel like you got ripped off. Really, the price of the charger is in the cable, and the connector. That is why you see such a price difference between the 30 foot and 50 foot charger you linked to.