Biggest problem is the frame. The higher in price you go the more your bike is optimized for a 60kg cyclist (125£) making the frame very weak for fats (literally outside of safety factor).    Then under inflated tires. The fatter you are the more important to have correct tire pressure. Otherwise you'll cleave the tube with the rim when you hit a bump. And since fats don't do maintenance.... Third is the wheel. Should be strong enough, but will surely have kinks in the first 500km.  Argh who am I kidding. The bike will be fine. It's not like it will be used.