I'll root any android phone and install custom roms for you depending upon your phone's specifications. Or i can send you the whole step by step tutorial on how to and you must do exactly what i say or else you might land in trouble losing your phone. And one more important this is it depends upon your phone too. If your phone is not a developer one then it might be difficult. Developing phones like Intex and Lava can lead to hardbrick too. So be careful. Or else before ordering contact me and tell me what phone you want to develop and I'll tell you if that is a proper developer phone. Best custom roms:
CyanogenMod 10,11, 12,13
One more important thing is that rooting your Android phone will void all warranty.