I think $7000-$8000 is an overestimation... I know very little about ico's and how ico scammers work, but i do know quite a bit about hosting, themes and finding cheap prices for services.
1) you can find stolen themes from themeforest all over the web, i'm pretty sure you can find one of the themes you're looking for for $10 or less. There is no need to assume a scammer won't scam themeforest (or an other template site)
$10
1.b) hosting starts from just $2/month (you're not looking for top notch VPS hosting, a shared hosting provider will do) + domain ($10/year)... So domain + hosting => $50/year
$10 + $50 = $60
2) i don't think there is a need for an original whitepaper, there is no reason to assume a scammer won't plagiarise somebody else's work, but if they want unique work, it might cost them $500
$60 + $500 = $560
3) i don't have any knowledge about how much token and crowdsale contract writers charge, so $100 seems realistic
$560 + $100 = $660
4) the first search i did for ann designers on this forum dug up a guy asking ~$150 in BTC for reasonably looking designs... I won't post links to his thread to discourage others from using this info
$660 + $150 = $810
5) i haven't got any experience with advertising on youtube, so your statement of $1500 to $4000 might be correct. Let's take the average at $3250
$810 + $3250 = $4060
6) $200 for a campaign manager seems steep, since i see so many of those guys asking for work, but let's assume they do ask for $200/week
$4060 + $200 = $4260
7) i've never seen those profiles for sale, but let's assume a 4-pack costs ~$800
$4260 + $800 = $5060
So, my estimation an ico scammer can set everything up for ~$5k, if he's willing to to part of the job himself, cheat other people, pay people in his shittokens instead of BTC/ETH, he can probably get away with waaaay less (i'm thinking in the $3k-$3.5k range).
Bottom line: as soon as i see the word ICO on a webpage, i usually close the tab and walk away...
Eventough i think $7k-$8k is an overestimation, i fully agree with the point you're trying to make, and i love the fact that you've taken the time and effort trying to help other people