if you can't afford a new (different) car now, you won't be able to afford one in 2 months
you can do whatever you want with wedding gift money, but buying a used honda seems like a pretty bad choice
and if you think that you're going to have more free reign with your finances after getting married, good luck with that
man the eff up and go finance a honda if you can't buy one outright, it's quite the adult decision and mrs wacky will be impressed