Id normally prefer the streetscum rules on page 354 instead of street levele play. As street level play only punishes non-awakened/emerged. But if your group is almost finished with character generation it might be too late to shift over.
While Im all for bending the rules a bit to better fit the concept of player characters, gaining free stuff for 90k+ in a campaing where priority A is a measly 75k is crazy.
That would be like giving a player for ½ a million nuyen stuff in a regular game, just because it "fits his concept".
if he really REALLY thinks its essential for his character, play by streetscum rules, then its actually possible for him (if he is a powergaming munchkin he will likely refuse, so be adamant about it

) In streetscum you have B,C,D,E,E as priorites or C,C,D,D,E so while its possible to be an elf technomancer with bioware, its gonna put a big limit on his powergaming, just remind him its part of his "concept".
If you and the other players (not the technomancer guy) find the streetscum rules too restrictive, you could always come up with an alternative priority list, like: B;C,C,D,E or something
mentors for technomancers are called paragorns