Well...you don't give the height of the opening, nor the material of the doors, so here's some general comments for a 16-foot wide entry:

--There's nothing wrong with two entry doors but the size mentioned may be better installed with pivots than hinges;

--Installing two doors means buying one which is likely to be seldom to never opened or used as a door, so why buy a door which is expensive?

--A 16-foot wide window wall with a single door may be a better option for such a wide entry;

--A window wall that large will require at least two structural columns (each side of the door, wherever it's located);

--A steel window wall will have the least obtrusive muttins of any window wall material (the steel is stronger and smaller in size):

Seeing your plan will help with ideas. We've got a 36' wide front porch that enters directly into the main room. Our front door is 42" x 120" custom made, but it's also flanked by windows going across the entire face. (sorry, can't find a pic without our wedding decorations in it). I will say that having a wide door is awesome for bringing in furniture. I would never put in a stationary door for several reasons.

We have a large double front door. I will just say that when something large (furniture, the Christmas tree) needs to be moved in or out, having those double doors makes life a whole lot easier.

We embedded our front door into a window set. Our house is 120' wide.

If you go with double doors - get operable ones. Or - the giant pivot doors are COOL!

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I
don't have an updated front elevation yet to share. We're waiting on this and a
few other decisions before going to CAD. Height of the opening from the
exterior is ~12', from interior it's 2 stories that'll have a picture window
matching the width of the door and sidelights.

Virgil
- buying a seldom-used [second] door was only a way to fill the
space and not have so much wall. To address that my original ideas were
a window wall or just 'regular' windows in the entry like htwo82's, but my
DW wants privacy. If she had her way there'd just be a single door with no
windows or sidelights--just 16' of wall minus the door width. I've at least
talked her into opaque sidelights but I don't think an opaque window wall or
opaque 'regular' windows like htwo82's would work so I came up with the
idea of two big 'ol front doors and two big 'ol sidelights not knowing two
42" hinged doors would be so difficult.

Pivot
doors are very cool, but only one still leaves me with excess wall. I'll ask my
builder if he has any issues installing two 42" pivot doors, or maybe I'll
look for a single pivot that's larger than 42". Still interested in any
other ideas to fill this space. Thanks.

Do you have an architect? Your description of the window above the door gives me some pause.

Yes. The house has a front porch that spans the entry and the adjacent room. The window is above the porch roof. I realize there are probably more stylish options for windows, but I'm trying to get as much light in that area as possible, hence the 9'-10' wide window. I'm open to other ideas.

Also Good rule of thumb when it comes to doors for every 1 foot its 1,000 dollars. Hope that helps.

"2 sets of Numa gliders doors with extra windows above the doors."

For the front entrance? Or Bifolds?

You need some professional help. Are you working with an architect?

"Millworkman - yes, for front entrance. Thanks."

That was more of a question for Foresight as it appears he didn't read your post. I knew entrance as that is what you typed. And sliders nor bifolds are normally used as a entrance or front door...........

What does the size of the entrance hall have to do with the size of the door? I've seen entrance halls bigger than my LR (which is not small!) and there is still a normal size door there. I do like a door with sidelights - nice to see who is there before opening and it allows light into the room.

If one is lucky enough to have a large entryway, enjoy the luxury of some furniture in it.

"...If she had her way there'd just be a single door with no windows or sidelights--just 16' of wall minus the door width..."

I could be wrong, but it sounds like the issue needs to be resolved internally with spouses...with a 16-foot wide opening which is 2-stories tall...that's some major space...you got to this point without agreement on how to handle it?

There are many design solutions for letting natural light into such a space, but preserving privacy for the homeowners, but they need to be explored with someone who has done this sort of thing before successfully.

Are you working with any design professionals?

Yes I do, and we've come up with a solution very similar to htwo82's home. Double 36"x96"s with windows only at the top 1/4 and 3'Wx6'H windows with treatment besides the doors so we can have privacy or light. Thanks to all for their input.