(Insert strong expletive here.) That's r i d i c u l o u s pricing for the average budget. You could go "cheap" on the blinds -- use old fashioned pull down shades in dark black -- then you can add your black sheers or something else -- perhaps a cornice or shag valance (long sided valance) as well to soften the look. https://www.google.com/search?q=solid+black+old+fashioned+roll+down+shades&source=univ&tbm=shop&tbo=u&sa=X&ved=0ahUKEwieopLal-DbAhWJt1MKHROhDMMQsxgIJg&biw=1366&bih=628#spd=518285860030355824&spf=1529427046761

Over the sliding glass doors in my apt, there is a half moon window running the full length of the doors. I have SE exposure and no outside overhang or such so during the summer my apt can get quite hot. During the summer I put blackout curtain backing strung on a PVC pipe up in that window. Once fall hits and our days get shorter and cooler I take it down until the next spring. My last "sun shade" finally disintegrated. I bought new blackout material/backing and a friend sewed it so I could mount it on the pipe again. I was thinking of trying to either use some sort of paint or ink to put a simple pattern on the side which will be facing into my apt to make it a little less boring. Any recommendations for a paint or ink that would be good for such a task without flaking off and making a mess?

For really good light blocking, fully lined Roman shades and fully lined operable drapes.

I spy a cute baby! As a toddler mom I definitely agree that blacking out more light is likely to result in your little one (and all of you) getting more sleep. On my own windows (which are a more typical setup) I've found a combination of blackout blinds plus blackout curtains gives the best results -- neither gets the whole job done, but in combination I can get the room super dark. I'm not sure you'll be able to get blinds or curtains to cover all of this, but if you cover as much as you can with each it should be a big improvement. Here's what I think I'd do: -Get three sets of exterior mount blackout blinds (I like the cellular kind, but for a very affordable option you might look at the Ikea Fridans) and mount them above each transom; buy them long enough that they can pull down to cover both the transom and windows below. This means for both the right and the left, when they're pulled down they'd cover some wall and some window. For the one on the right you'd have to stop the shade at the edge of the closet. -Mount a curtain rod above the blinds (making sure it projects far enough not to interfere with the exterior mound blinds) running the full length of the wall and put blackout curtains on it -For that little piece of window on top of the closet, I'd sit something in front of it (nice looking box?) to block the light.