I've just read through all of soon2bemrsf's posts.
Apparently, she and her fiancé are trying to have a family wedding and be as inclusive as they can be (@200 invited). They are not planning a "fancy" wedding. What money they are spending is going to be spent primarily on their guests. (The bride's dress cost @$150 dollars.)
They have to pay for their wedding themselves. Having a Friday morning wedding will save money on the venue and security, and make it possible to invite the number of people they feel they need to invite.
On the other hand, having a Friday morning wedding is going to mean that some people may not be able to come, and for others it might be something of a hardship getting off of work.
That is the dilemma they are facing, I believe. (Please correct me if I'm wrong, OP).
This isn't a case of a self-centered bride and groom trying to have their dream wedding at the expense of other peoples' feelings. I believe they want to make the most people happy, while providing a reasonable level of hospitality for their guests.
I have to say that I've been to some Friday evening weddings, but I've never been to a Friday morning ceremony. It is a difficult time of day for those who work (which, let's face it, is most people). Of course, siblings and parents would go the wedding regardless, but some other guests might not be able to. Others might end up taking off time from work but grousing about it.
I think that if the bride and groom have the support of the parents and siblings in this plan, those relatives should be able to explain to the others why these decisions were made.
I didn't think the bride was asking "Should I have a Friday wedding?" although she may be. I thought that decision had been made and was irrevocable.
In any case, I really feel for this bride-to-be.