I am looking to replace a sliding patio door with French doors.?

There is really no such thing as a standard size door. It should be custom made to fit properly. I sell aluminium french and sliding doors and I think it is the best type to use.

French doors are very popular. You can get standard doors on special order for about $750 (they have sales on them for less, but you're stuck with whatever the opening direction and active/passive side is). For a couple hundred more, you can get the kind with dual panes and mini blinds in between. I have these and they're great. We can either have the blinds completely open, have them down but tilted open for filtered sun, or completely closed for privacy. These come pre-hung (frame included). So, you're looking at another coupla-few hundred dollars to have them installed, plus any internal or external trim or siding work to be replaced. I would say you can have the whole thing done out-the-door (no pun intended) for $1500 to $2000 maximum, depending on what type of doors you get. Now the question is, "Will this add $1500 to $2000 to the value of my home?" If the overall look of the room they're in is improved, it would certainly make the home more appealing. That might mean that a prospective buyer may be more likely to put in an offer. But, when you're looking at the difference between home prices with or without the doors in place, $2000 is kind of negligible in the big picture. If you have the cash lying around, do it. If anything, you get to enjoy the doors until you sell the place.

Sure.