I can see the desire for uniformity that 20 solar shades would give. Is privacy an issue as well? Solar shades tend not to provide privacy.

When I was buying lots of window treatments, I made a spreadsheet with my window sizes and shopped and compared the internet retailers. Many will offer their own brand at a cheaper price in addition to the national brands like Bali. I don't believe you will find one company that is consistently cheaper than others - it tends to depend on the item and any sales going on at the moment.

We are currently trying to decide on window treatments for 103 windows!

My suggestion is that you first decide what you need for each room. For example, in the bedroom do you have views that you don't want to block? Do you need privacy? Do you need something that will frame the windows and dress up the room?

Honeycomb blinds can provide privacy but not block out light. It they can almost disappear up into your window frame without blocking your view. Sheer panels are more dramatic and soft in a room and provide privacy but do not block light. Wood blinds are great for offices and utility rooms (and they can be a cheaper option too).

If you are looking for a good price on drapery panels, I'd do the faux panels that sit on the side of the windows. They aren't functional but they require a lot less fabric so they are cheaper than fully functioning panels. I'd price out Smitth and Noble but I'd also call around to seamstresses locally. That is where I've found the best pricing in the past.

I've had good luck at jc penney and overstock.

Thank you! We mainly need solar shades on the East and West facing windows... Southern California HOT sun.

I just thought for uniformity, but I know they don't offer privacy. So, I was thinking full drapes on certain windows... like Master Bedroom.

For drapes I had good luck at halfpricedrapes.com. They're continually having sales of some type. I like lined drapes (they hang better and afford privacy), so recently got lined white Belgian linen ones there during a buy one get one sale. I like the look of them with my white trim and dark woven blinds.
And as others said, Jcp.com has had good deals, though when I last looked, their inventory was much less. I was hoping overstock.com would get some in since they have good deals, but they never happened to have the size and color I needed, so that's when I found halfpricedrapes. Good luck!