Infiniti tier 1,2,3 credit

Hi hackrs,

Trying to help a friend who recently totaled his car and wants to lease a new one. He has Infiniti vpp so I was steering him towards the brand. Either the q50 or qx30 could work payment wise from what I have seen on here.
The issue is he is credit challenged. Some mistakes in past never go away. In any case his wife has decent credit but no income as she doesn’t work. Does anyone have any idea on what Infiniti considers tier 1, tier 2 etc and the increase in base mf as you go down the tiers?

Thanks for hour help

I heard Infiniti tier 1,2, and 3 has same MF.

I had a friend who was in the same boat. He put his wife as primary, and himself as secondary on the credit app since he’s the one with income but poor credit. They got approved that way.