baby food isn't good for crested geckos because it contains a lot of sugar but fresh fruit is great for them and many really like it. fruit in conjunction with cgd is a very good diet. your plan looks good, i would just say that if you don't do fruit on wednesday for whatever reason go ahead and give cgd that day. you will have to experiment a little to see how much your gecko will eat. a very young gecko won't eat much while an adult can eat a pretty good amount. start out with about 1/2 teaspoon per feeding and see how that goes. if it dries up too fast you can make more than that or add a bit of plain fat free yogurt in place of some of the water.

you don't have to have plants but you need enough for them to climb on and hide in. i use fake plants in most of my enclosures along with eggcrates, and bamboo perches. i also put a paper towel roll on the bottom of adult enclosures as they seem to really like to hide in those.

i'd be careful getting a gecko shipped to you if the cost is only $7. generally shipping costs more in the range of $30-60. make absolutely sure that you get overnight delivery. the gecko should be shipped in an insulated box with heat packs in it. ups or fed ex is the carrier that should be used. i would advise that you ask a lot of questions about the shipping method, and be VERY wary if they tell you that they ship via usps.