it's hit and miss with any airline, as to whether you will be required to have a flight leaving Thailand within the number of days you're stamped in for, if you're worried just book a cheap flight to a neighbouring country, or just chance it!! If they won't allow you to check in, when you arrive at Heathrow, just step away from the check-in desk, and book a flight there and then, they would accept that no problem.
if I say "with all respect" from me it means my comment is not meant to be disrespectful, I have never had American beef, so maybe I don't understand, but I think I've had some pretty good steaks in my time, and it's just not that important to me, I understand if you want to show your Thai family the difference in quality, but think about this, if you plan on retiring in Thailand in the future, you will need to do without some of your home comforts, such as your favourite steaks.
I can't see the point in transporting something from the other side of the world to Thailand, when it's available in Thailand, with all respect, I would think most people have got more important things to worry about.
sorry I can't recommend any in Bangkok, but if you decide to go to Pattaya, there are lots that can assist you there with your visa requirements, or obtaining Thai car and motorcycle driver's licenses, or opening a Thai bank account.
How old are you?? I believe the nightwish group are always looking for Pattaya bar managers, if you're under 40 years old and fancy it, go for it, I've heard they prefer lads with a good personality and no experience.
FFS that's all we need, another COVID debate, please keep all that nonsense to yourself, the rest of us want to continue getting on with our lives, if you're worried, go and hide behind your settee until it all over 🤷🙆🤦😂😉