I need a big favor from you!

I need a big favor from you. If you could help me out I will be very very happy because I need help regarding something that is very important to me.

There is a website that I'm working on. The site has over 500,000 pages. My objective is doing link building in order to increase authority of the website and get organic traffic from long tail keywords. Unfortunately, I can only dedicate 1 hour every day because of personal responsibilities because I gotta take care of my sick brothers.

For this kind of website, can you please share a fail proof link building plan? I'm very tired of trying and failing with no luck. I just need a way that I can get real results even if it is slow.

I know the question sounds stupid and sort of selfish, it's like I'm asking your money or business plan. I wouldn't ask but I really need some help because I couldn't do it myself. I promise I'll remember your help and I'll return the favor.

I want to be able to invest my savings to this project which corresponds to $1000/month for 12 months because I really believe in this website's potential. But I have nothing on my hand. No real way of increasing organic long tail traffic. Despite many try and fails.