The other answers regarding the value of the upgrades--having to see and evaluate the property--really are correct.
The absolutely honest answer, though, is that many of those "upgrades" won't return anywhere near their investment. They may make it more pleasurable for you to live there. And they may result in a quicker sale when you do sell. But a lot of those won't return your investment. For example:
Two Drives: Are both necessary? I'm not aware of people paying any more for a second drive. And a second drive can eat up valuable lawn space.
Three Exterior French Doors: They look nice and may help your home sell faster. But unless they were replacing some really ugly, barely functional doors, it's not a great investment.
Large Office Area: If it's new space in the home, maybe. But if it's just finishing an unfinished basement, it'll add very little. And if you had to cannibalize a bedroom to create the office space: No.
Huge Windows With Skylights: Depends on where the windows are, and which direction they face. It adds almost nothing if they face north or west. And in today's energy-conscious environment, people worry about too many unnecessary windows.
Upgraded Kitchen: The kitchen is one of the two prime selling points in a house. The master bath is the other. If you're upgrading from a 1970s kitchen, it'll return a big chunk of value so long as you don't go overboard. But there are plenty of ways of upgrading a kitchen without spending a fortune.
Dining Room: Very little return. Most people already expect a decent dining room.
Master Bath: This is the other big selling area. But there are right and wrong ways to do it.
Again, really, you'd need someone to take a look. But from what little you've described, I'd expect a 30 cent to 50 cent return for every dollar you spend. Yes, it'll sell faster. But it won't be a terrific return on investment. Done right--done judiciously--you might be able to get back about 75 cents for every dollar you spend.
Hope that helps.