I'm planning on starting a eCommerce webshop. I have registered the domain without webhosting. I also registered 3 other domains with the keyword in it. My plan was to use those other 3 websites to boost my rankings. All 4 domains are bought without webhosting. Now I'm wondering is it possible to buy 1 webhosting for all 4 of them or do I need to buy webhosting for each of them?