bassinet?

Lexi
I have the bouncer and rock and play. But should I have a flat bassinet for night that I can put by my bed?
How long will baby sleep in the bassinet and what brand/kind do you use?
I don't want to spend too much if it's temporary and looking for portable option.
Thank you
*Thanks for feedback on crib sleeping. 
Basically just looking for product recommendation - Portable flat back bassinet so I don't have to sleep in the nursery first month or so. Not super heavy or fancy because the pack n play is already down stairs and huge/heavy.