Answers to your questions
[QUOTE=Auriflama;1159598]What areas is good to stay to minimize these costs? I was thinking about staying in liberdade is that a good area to minimize costs for transpo? Also how about renting a car? Is this ok as long as you just drive from destination A to destination B and no joy riding.[/QUOTE]Liberdade is close to Centro. If it's the location you want to spend time. It always depend on what kind of activities you wan to have:
1) freelance garotas (most of them are in Jardins or in Moema). Staying in Liberdade gives you, for example, the opportunity take the metro (subway) at São Joaquim and go to either Consolação or Trianon Masp which are not for from Jardin (several garoatas freelance are either in Jardins or Bela Vista).
2) From Liberdade (São Joaquim) your not far from Ana Rosa metro station. From that station you can easily reach a good (but not out of this sight) privê: Privê Redway. Or you can take a metro (on the blue line) from São Joaquim to Santa Cruz. From there a bus to Moema where there's an excellent CLínica: Red massagem (for me, actually, it's the best place in Sampa!).
3) If you are in Liberdade, taking the metro up to the CLínicas station (on the green line if I'm not mistaken) will bring you very close to Bomboa.
4) Another good place to stay is Jardins. You are close to most freelances garotas in Sampa.
5) Staying in Liberdade / Jardins gives you the opportunity to find restaurants that are goods and not too expensive.
6) Renting a car! No. Either you will have an accident (Brazilians drive fast) , get lost (to drive in Sampa you MUST know the city) or get jammed in the traffic (one of the worst problem in Sampa: o transito! (the traffic).
Be modest. Take busses or metros: they are good means of transportation. Try to avoid them in rush hours however. It's not like Tokyo but there's too much people transiting in the same time then. It's not pleasant.
For those interested in fetish, domination, etc.
An old friend of mine informed me that, besides "standard" service, she now offers fetish, domination, etc.
Just have a look at //camilafetiches dot b*l*o*g*s*p*o*t dot com
I can vouch for her "standard" service which is excellent, however I have not tried the new specialities (honestly, I am not interested).
Enjoy.