Hi Lexy
I probably meet your criteria. I am 6’3″, played a lot of rugby in my younger days, and started BSD in early Aug but in earnest in early Sept, I started at 23st7lb and now weigh 18st5lb. Over that period, I have reduced my blood pressure to normal and reversed the fatty liver symptoms.
I am a bit of a data freak and since Sept I have eaten an average of around 930 calories a day and 41g of carbs. My go to foods are spinach and any other leaves either raw or fried. I eat a lot of eggs and fish, both white and oily, in frittatas or omelettes and a lot of avocados, feta and blue cheese in salads or bakes with tomatoes or aubergines. Baked avocados with eggs in the middle are great with a salad. Yogurt and herbs as a sauce with fish or chicken, with tinned or frozen beans.
Most places have a local leaf that can be used as a low carb filler for meals and to support a primary protein. One thing is that I have started to use a lot more herbs and spices as my tastes have changed.
If you could tell us where he is, that may help.
I work away from home a lot and have taken the approach of just not eating the white stuff on normal meals when i have no other choice, but focus on keeping the carbs low.
It is not easy for the larger chap, but definitely doable.