Sunday is a wonderful relaxed day to plan a wedding if the timing is right. Early afternoon is perfect; everyone can actually arrive there on time without rising at the crack of dawn; everyone can get back home in time to regroup for their Monday. Sunday afternoon is also a time that defies description, menu wise. You could do a brunch, a cocktail grazing party, an early dinner. Almost everything on a Sunday is more low key (translated= less expensive). Your dress and your attendants’ will be not so formal; the men will follow suit(no pun intended). Floral centerpieces, menu and music will all fall in line.
This being said, Sunday morning will be a tough time to book a church so (SHAMELESS PLUG ALERT) finding a civil celebrant will be the perfect choice to officiate at the site of your choice.