things you need to make a scam investment website:
1. hosting - people who are buying hosting will just need to spend around $1-3 monthy to keep it running.
2. domain name - this is the name of the website you can get this one for as low as $1
3. script, hyip, doubler, cloudmining or even ico's - scammers can buy this kind of script for a cheap price ($1-$10) this can make them an instant web developer scammers can able to build a website without coding skills just by uploading this script on their purchased hosting.
i hope this post with enlighten the mind of people who want to invest in this kind of website.