Car rental USA Seattle -> Las Vegas [closed]

I would like to ask, what is the best option for renting car in USA.

I am 25 years old. My friends are 24 and 23 years old. We wanted to take care from Seattle to return it back in Las Vegas. There are some problems I run into.

-> We do not have credit cards (only debet)
-> I am going to leave them in Los Angeles at the middle of trip
-> We would like to minimalize under 25 years old fee
-> We want to have two additional drivers

There are two options
1) We take car at Seattle, WA on 30th April and return it on 13th May in Las Vegas, Nv - 2 additional drivers, I am upsent from 6th May
2) We take car at Seattle, WA on 30th April and return it on 6th May at Los Angeles, CA and take other car from LA, CA and return it on 13th May at Las Vegas - 1 additional driver, in second route the main driver is under 25 years old.

What can you propose for me?