I dont think it is that we are being pessamistic, just realists. To have any chance you really would need a budget of $1m. The big companies probably spend that each month on advertising and still have trouble competing with eachother.
Howeaver, if you site is a niche site then you need to find out where abouts on the net members of that niche hang out, and then hit the advertising there. If it is a general dating site (not gay or fettish or similar) then you will need to hit FB advertising - but not normal FB ads - You would need expensive sponsored ads or the ads that greet every member on the sign in and out screens. Google ads would be worth while if you didnt do it cheaply... #
I think this is why a niche was recommended, because it is easier to locate, get to and influence your target market.
My main tip - join all of the other dating sites, research the shit out of them, check their business records, marketing budgets and stratergies (at company house) and look very closely at where and how they advertise.
Also, make your site have two membership options - standard and premium. The get Antons membership vouchers module. The go to the largest groups on FB and drop free upgrade codes into those groups - it can encourage sign ups.
Mainly target women - If you have lots of women on your site then the men will come naturally looking for them!!!
I have personally spent over £30 000 on a site and advertising, that does not guarantee success - believe me - I wish it did. But, like everyone else, I do wish you luck.....
Nathan