cirno, my situation is almost identical to yours, and I believe your plan is feasible. But living a minimalist lifestyle and retiring as soon as you hit 3% of net worth spending does not sound like a good idea. It pigeonholes you into that lifestyle, which will become inflexible if you encounter changes later in life (family, illness, etc).
Personally, I plan to hit 4% of net worth spending by the end of this year, when I am 24. When I am 25, I should hit 3%, and at that point plan to remain working and stay at 3% until I am satisfied with the lifestyle I can afford. At that point, I can retire if I want to. By 30, I can have close to a million net worth and ~30K annual spending, and if I continue working it's only up from there.
As far as housing goes, I am not interested in maintaining a house and would prefer to buy a condo. I think not having to maintain a property is worth the higher fees.