Before you purchase a Weldbilt, read through this thread. This is my 2013 Weldbilt 1752. I've since completely restored it.
https://www.forum.tinboats.net/viewtopic.php?f=3&t=39292&hilit=weldbilt
Here's my opinion on Weldbilt:
The price is the most attractive thing about these boats, and you get what you pay for. They aren't pretty, but work. Any boat you buy will be made of .080 aluminum, unless you specify you want .100. Most other manufacturers use .100, or .125. That being said, they're VERY light. My 1752 with a 40hp ETEC tops out at 32 mph. Again, they aren't pretty. There's not a straight edge on this boat, but it's a Jon boat. If you want pretty welds, and flat decks, buy a Tracker, Alumacraft, Alweld, etc. If you're looking for a cheap, no frills hull, Weldbilt is for you.
I don't have any experience with Tohatsu, but I do know they're made by Nissan, and seem to be a good egine. I live in South Florida, and a lot of guys run them on their technical polling skiffs because of their high power to weight ratio.
I won't try to sway you one way or the other, but know that when you buy Weldbilt, you shouldn't expect high quality. I'll take some pics of the lacking quality I'm referring to later.