New Project: Beds for the girls room

Having been inspired by Shanty2Chic, I followed her link to Knock-off Wood. Have you ever visited? I have been totally inspired to build my own furniture. Ana White- of Knock-off Wood started her blog 5 months ago- and in 4 short months had 1,000,000 followers, and after being noticed by William Sonoma for using their pics and names (even though she gave proper credit) has now grown to 2,000,000. She writes plans for furniture like those sold for 1000% markup from what you can build.
I am building the daybed that she has plans for. Well, I am building 2 of them and may, at some point, build another 2. My 3 year old twin girls need to move out of the toddler/crib beds and into twins but after shopping everywhere for beds less that 200 dollars apiece, (for cheaply made bed that may or may not last 3 years), I have decided to build my own. My inspiration is the PB storage bed in this configuration:I am using Ana's storage daybed plans, and my dad showed me how to use my table saw that I purchased after one Home Depot told me 1/8 of an inch short was acceptable (hah!) But I discovered I was short by 3 pieces so I went to a different Home Depot and had them cut my wood. Eric at Home Depot in Pflugerville totally rocks! He cut with precision - and didn't even charge me for the cuts! I brought all my pieces home and piled it up in the garage.
I spent some time last night, and some time today sanding the backsides of the Cabinet grade plywood.
Here is a sanding tip for you- try to sand outside, or else you will have white powdery dust allover the garage. Don't ask me how I know that hahaha.
These beds are for my girls so I want to make sure that they are sturdy and very smooth, including in the cubbies. So, I did an initial sanding (and wood filler) today (and some last night). I am going to apply sanding sealer and let dry (instructions say 2 hrs) and then resand. I am not painting them today because I am going to do that step outside and it is very windy, although absolutely beautiful, today in Pflugerville. I really need to figure out how to make the corner unit- this configuration at PB is 1600 dollars, not including shipping. AAAK!
Want to see the inspiration for the room?
So far, not including the cost of tools- since I will use them for multiple projects- I have the following invested:
6 sheets of cabinet grade plywood- 2 sheets at 23.00= 46.00
4 sheets at 29.00= 116.00
Benjamin Moore Stem Green paint 1 gallon at 27.00= 27.00

So a total for supplies of $189.00 for supplies.

Now tool wise I have spent a few hundred recently- purchased a table saw, sliding compound miter saw, compressor and nailgun (purchased to replace the stairs, gotta tell you- it is sweeeeet!), and yesterday I purchased a heavy duty palm sander (love it) and a paint sprayer to make painting easier.
Now I need to get these beds built to justify the purchases! If these turn out well, the boys will get new beds that match - probably in espresso color. On another note- my Home Depot today was so crowded- everyone is doing weekend projects I guess.