I have said this in many places and I am repeating this here again all HYIPs are scam. They might pay in the beginning but later will run away with your money. I do not intend to teach you guys how to scam people through HYIP. All I want you to know is how HYIP can be launched and how much it cost.
HYIP or High Yield Investment Programs are fake investment programs that have no intention other than scamming people. They can be launches easily just in a few hours for less than $500. here are step by step processes.
Domain: You need a domain and you can get it for less than $13 if you are buying a dot com
Hosting: In the beginning, VPS will be ok, which cost about $10 per month. However, if the site grows with a lot of users you might need Dedicated Servers which cost just about $40 per month.
HYIP script: Based on what kind of HYIP you are trying to launch, you can get HYIP scripts for $59-$399. The higher price for the script also offers installation and customization.
Marketing: You start marketing on other HYIP and PTC, which can cost you just about $100 for one month (provided you do aggressive marketing)
Return on Investment: You start earning the moment you launch. Just a couple of ads on high traffic site, you can easily "fool" people to invest.
My verdict:
Do not try this