Do you have a copy of the policy and did you read the fine print? Certain hospitals may not be on the list and also if there is co insurance, you may need to absorb a certain amount for the treatment and the rest of it is covered. There will also be an initial period where you cannot make any claims. Do you have any travel insurance coverage? Maybe that could provide cover instead.
then you need to buy the chilli, ginger, garlic, condiments, unless you cook Thai food without spices. If you cook for a family, yes it's cheaper to cook at home but for 1 person it is not unless you intend to eat the same dish over a few days. You cannot buy 50baht worth of ingredients and cook that 1 dish. I know because I do cook. For steaks and lamb, I cook at home because it's cheaper than eating out, but to cook pad krapow at home for just 1 meal? The ingredients list is more than 50baht even if you buy it from a wet market . There is no economy of scale.
if the 2 small burners are not enough for you, you can get a portable induction cooker relatively cheaply. I find a pressure cooker really useful and quick for 1 pot meals.
It can actually be cheaper eating out than cooking your own food unless you do not enjoy Thai street food. It's expensive cooking for 1 person because you need to get a list of ingredients just to cook 1 dish.
In the Midwest, you have to drive to get to a food joint. Over here, you only need to step out onto the street and you'll find a food cart or two, 7-11 round the corner with ready meals. And most are 30-60baht only.
Most apartments here provide a small kitchenette even for studios. My 1 bedroom even has a full sized oven.