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The make is FELT, it is a Cafe 750 model.
https://webimg.secondhandapp.com/FELT-BEACHCRUISER-750-Cafe-Fahrrad.jpg
It is a really beautiful bike even before any upgrades. Other Felt models come equiped with other forks, some with other tank shape... just google for Felt Cruiser pics.
It also has an integrated tank in case one would like to mount an Otto engine on it, because that's what they are also frequently used for. It looks very agressive with a Girvin fork on it, in case You want that. The Cafe 750 has an aluminium frame, but I think other models have steel, which is useful in case You want to have disk brake mounts welded to the rear triangle. There are bolt on adapters from China too. That said I have disk brake only in the front on both my bikes, 160mm, nothing fancy and it is overkill really. I weigh 210 pounds and the brakes are more than efficient and adequate, I don't use much the rear brakes. Actually when I bought the one bike it had V brakes and on the ride home I was surprised how well they held. You only really need disks if You are going fast, over 15 m/h I guess. For a normal cruising (pardon the pun) speed of 25 km/h (around 17 m/h?) that an experienced cyclist has no problem achieving on its own - V-brakes and a coaster are enough. It is true most midmotors have feewheel so they wouldn't work with a coaster, but there are number of midmototrs that do have that option.
I have the Bafang 8Fun BBS01 installed. The battery is 10000 mAh if I remember correctly. I've been very happy with the build, it has a very smooth ride, thanks to the tires (You could go bigger, there are frames that accomodate 26x4 wheels), the telescopic fork and the spring saddle. I have ridden with the throttle only, it had enough juice to carry me on a 20 miles roundtrip with set max engine speed 20 mp/h. Pedal assist only it lasts maybe 70 miles. So I think the battery is also more than adequate to meet average Joe's needs. It was easy to install too. It has a great pdf programm manual I have on my phone, but just don't really need
The Porucho frame is also a popular choice among cruiser crowd.
http://store.ruff-cycles.com/ruff-cycles-frame-porucho.html
The framekit for the Felt costs 299 $, actually not that expensive when You consider You get the rest of the parts for less than 100 $, You have 400 $ total bike price.
https://www.feltbicycles.com/USA/2016/Bikes/cruiser/frame-kit/frameset-canvas-cruiser.aspx
It would be much cheaper just to get a used cruiser, they are sturdy built bikes anyway. Don't take anything with 1" steer tube though.