Dilemma of a lifetime

I am super cheap if you didn't know that.  When it comes to summer pajamas my son wears hanes (or off brand) undershirts, and boxers.  That means I can get at least 5 pairs of jammies for less than $20.  Much better than one set at Old Navy for $20, or one set at walmart for $9.
But here is my problem what do I put my daughter in?  At first I thought why not boxers, but she isn't going to wear blue and gray plaid, it isn't beautiful enough.  I'm wracking my brain, I did the same thing last year, I never really came up with a solution, we did undershirts and whatever else.  I tried last night to just put her in a big shirt, but she was very distraught over not wearing pants.  Right now she is sleep in long pants and a long sleeve shirt, but the pregnant woman in me is screaming its so HOT! Sure pajama sets for her are only $7 since she still wears toddler sizes, at least one more year.  She is super petite but I have to put her in 4t shirts, I guess because society likes girls dressing skanky, I don't know.  But now I'm think I might buy some bigger girl (as in not toddler) camisoles, and sew them up with one seam to make them skinnier, and tell her they are nightgowns/ night dresses.  I wonder if she would buy it, or if she would think she needs pants.
By the way I should mention our house has no a/c.
Any good options for cheap and easy (as in less than three seams on the sewing machine) girl jammies out there?