Blackrideable and cheap anyways.
Accommodation & Wild Camping
Mall "Duna Plaza" on the northwestern part of the city (metro stop gyongyosi utca) hide some nice spot to lay down on your mat if the wheather is too harsh outside and you haven't found any host. Hills on Buda side of the city are good for wild camping in good season.
Food is generally quite cheap compared to the rest of Europe, Dumpster Diving and shoplifting are also possible.
On the top floor of the central market at Fovam ter, there are many food stalls, popular among tourists, most of whom are ignorant fuckers who order what they want but not what they need, i.e. A LOT of leftovers on the table. There are public tables where these fuckers eat and they are not frequently cleaned by workers, thus easy opportunity for table diving. Please do this, even just once or twice. I have seen big sandwiches and baked potatoes and such being left after a single bite. We should make wasting food a crime.
Shower & swiming
Add info pls
Well, somebody will kill me for putting this here: CEU wifi (on the Nador / Zrinyi ut.) name: ceu-guest pass: Budapest1991
Forint is not really the best currency to busk, 300Forint are 1€ and the biggest coin you can get is 100..Hungary is generally quite cheap so it is proportioned what you earn with what you spend though it is definitely a smarter option busk in a nearby euro country like Slovakia or even better the richer Austria (Vienna is not so far from Budapest..) and come back with money to spend..
Busking on the Buda side, on the territory of the Buda castle, may be fruitful. There is a tower, and when people go up they hear how you play, then they go down and give you money. you can busk in the main pedestrian street or Deak Ferenci Ter on the Pest side of the Duna or near the National Monuments on the Buda side. Lots of tourists all around the centre and locals as well.
Second hand shops
A lot of Humana shops, but they don't accept things, only sell. There is a thrift store on Wesselényi utca 51, and you can bring things (as well as buy) there.
There are Flea Markets. one is on the weekends at Budaorsi Viragpiac. another is at egerszalok utca 37 from 0600-1300 on weekends.
There are some places for nightlife / places to grab a cofffee during the day in the Jewish quarter
Ricsi's world jewish street food -- the place ususally has musicians in the evening who play traditional Hungarian music
Fekete Kutya -- just a place where locals meet for a shot
I reaaally like the place called Massolit -- it is a vintage bookstore, also there is an option to have a coffee, and there is a tiny green courtyard with 3 tables (looks like a countryhouse garden)
Another cafe which I can recommend is Terv Presso (also in the downtown)
There are two large social centres for the left/artistic scene. they both hold concerts, workshops, events etc. one is called Aurora social centre. its at Aurora utca 11. the second is called Golya presszo, at Bokay Janos utca 34.
Bathhouses: Budapest is famous for its bathhouses. the Kiraly bathhouse is very old and unrenovated in a quaint way. attendance is mostly limited to locals, unlike the more famous bathhouses. price of entry is 2700, 1800 for students, and you get 1300 back from full price if you exit the bathhouse before 1200.
There's a place called the Japan Foundation. it contains a library of japanese books, and spaces to read and study. its free to visit.