I am supercurious. Btw you can find me on instagram. I use jbb_777 there as well. Are you on instagram as well? I am planning to post your pictures as alternative build on my insta. It would be nice if I could refer to you somehow.
I dont know. You can download the partslist from rebrickable and import it to rebrickable. There it depends where you can buy everything. My guess is that it should be between $100 and $200 depending on how many parts you already have and which stores you select. Also keep in mind that the color of the inside parts does not matter.