Ux with no budget or time, how? [duplicate]

My job is a small web agency and our boss negotiates and offers UX services. The job consists on producing research, analysis, user journey and personas sometimes in a week or two. I know this is very little time to do it, however due to budgets and timelines these is what is expected. What kind of ux can you do that is helpful? How would you do user journeys and personas without having the chance to make research with users.

I know some would say “no, you can’t” but some companies pay and ask for some helpful results with these kind of limitations.