Can i ask what everyone’s budget is for flowers/decor and your thoughts on faux flowers/combination?

Hi everyone,
I’m getting married in September and just wondered how much I should be spending on flowers/decor? What is reasonable? We have about 100 guests and are open to all layouts/low or high level centres etc. Also what are your thoughts on faux flowers/ combination of both fresh and faux? Can it work and save money?