Purchasing a ball joint doll?

I recommend buying the body and head meant for it at the same time. Every BJD maker has different size/shape bodies with different width/angle necks, and some even attach the head differently. Also every BJD makers' normal resin is different in shade, ditto for white resin, etc.

It will probably be least expensive to have the BJD maker do the faceup (face paint aka makeup). You can search for other BJD painters/esthetics/customizers/artists but I think most of them are going to charge $75 or more for a faceup and the reputable ones will not copy anyone else's faceup. You will end up with a faceup sort of like whatever you describe.

Wig - you measure the head then buy wigs wherever BJD wigs are sold

One wig shop and measuring instructions

http://www.facetsbymarcia.com/wigshop.htm

I also buy wigs on Ebay, denverdoll.com, jpopdoll, cancan j-style, and occasionally I bought wigs in Leekedoll preorders.

Eyes - ditto - you can get them anywhere that sells BJD eyes and you put them in with NON-oily putty (many use white or flesh color Super Sculpy from the craft store - comes in a little block). The BJD maker should list what size eyes are best for the BJD. And although they can look cool, I recommend against high-dome eyes - it is hard to position them to look natural and they can look distorted in photos. I like low-dome or no-dome eyes and I position them slightly higher than centered and a teensy bit crosseyed so the BJD looks like it is looking at something close - i.e. looking at you or your camera, not staring blankly into the distance.

Clothing is tough - it depends on the measurements of your BJD. But if your Minifee is a female, then she shares shoes and clothing with Unoa and Narae, two other popular slim mini 42-cm-ish BJDs. I think Narae isn't sold anymore but Unoa is and people still sew for Narae and Unoa. Check Ebay and Google/Yahoo and search for Unoa clothes. Also lots of clothing sold as for "1/4" BJD should work.