How to handle obnoxious and unwanted financial questions (see details)

So I recently moved into an apartment that is very nice and pretty huge considering where I live. Most of my friends (and certainly my coworkers) don’t make all that much money and live either with lots of roommates or alone in small apartments.

I moved from my studio because I found this 1 bedroom for a great price and in a perfect location. But I’m now constantly faced with questions regarding how much I pay. I even had one ‘friend’ repeatedly ask “who died?” last night when I wouldn’t tell him how much I’m spending on rent.

It’s really not anyone’s business and I try to avoid the question if possible. (Someone at work asked multiple times in front of other coworkers how much I was paying and I just walked out of the room after ignoring the question the first 2 times.) Last night, I was prepared for the questions and just simply stated that it’s none of his business and not to worry about it. But he was so persistent that I eventually had to explain that I like being at home and it is worth it for me to spend my money where it’s useful for me.

I don’t like feeling spoiled or being judged because I have some nice things. It makes me very uncomfortable and also makes me feel like people expect things from me (like to buy them a drink when we’re at the bar, or to loan them money when they need it). I’m not mean, but it’s not my job to support people, especially when they’re not particularly close friends.

I don’t know why these people are so immature but I need to figure out a way to handle these tactless friends. Especially when they won’t take my obvious discomfort as an answer.