Decisions decisions

so i got an e-mail today from someone who said they heard about me from a friend o_O. the e-mail contained a request, one of which i have no clue how to answer. let's call this kid gabriel. gabriel wrote to me telling me he heard i was a design student a PCC which is true, and that i was working on a t-shirt line (emphasis on the past tense). i told him i was no longer doing t-shirts, and wanted to focus more on my higher end stuff, but he made this request of me. to collaborate with him to design a sick t-shirt to help him get his start. he said he's down to pay for the cost of production and shipping. he just needs help with designing and marketing. i'm kind of iffy about this because as i said before i'm done with t-shirts lol. i also said i wanted to focus on me, but i'm kind of at a crossroads with what to do. i also as hoping my first collab would be with someone who i already have ties with. but it is a good opportunity and i wouldn't have to pay for anything (which i feel bad for so i'll probably go half and half if i decide to do it). hmm it just came at such an awkward time when i said one thing, and if i do this, i might look like a complete hypocrite. hmmm come on sandman bring me a dream lol.