Is it feasible to have a small kitchen and bedroom?

Yes, but the cost will be high for three reasons.

First, the overall cost of changes to the water supply.

Second, the overall change of the sewer should be negotiated with the downstairs.

Third, and most importantly, the gas should be removed as a whole.

If the problem of gas and water supply can be solved, it can be changed.

Since the size of the unit is not clear, it is difficult to suggest other ways to change it, if it can be provided, it can be suggested later.

Hurry up, my house is almost the same as yours, I live in the kitchen, my kitchen is also on the balcony, I feel pretty good. This is my personal feeling, having lived for almost 5 years. However, pay attention to the modification of the corresponding equipment during the construction of the kitchen, such as the water pipe, the sewer pipe, and the flue.

I think that while it works, it doesn't feel very good.

So in my humble opinion: put the dining room in the first place at the door, a smaller table, enough for it; The living room was converted into a bedroom, and the location of the dining room was turned into a living room.

This is my personal suggestion and I wish you a new house soon!!