Hello Marius!
You really are the best type of Steem user. Not only do you have the means to invest large amounts into the system, but you are not just in it for yourself. It is great that you are looking for ways to help others grow, and in turn help Steem grow.
My personal answers for your questions are as follows:
#1 - Yes, I think you giving upvotes to quality content is a great idea. Even those that know how to create great content need that boost so they don't lose interest when they see their effort get no reward.
#2 - This would be a good balance to add in with #1. Along with that, perhaps if you find an author that you think has potential to become a great author, maybe delegate some small amount of steem to them so it is easier for them to move forward with posting, commenting, and voting. And the little boost they get from someone can go a long way to make them want to stay.
#3 - I think this can be done among accomplishing #1 and #2. It is an important aspect as well. For many Steem users a decent reward they can get from a single post can go a long way to helping them live.
I would love to talk to you about more ideas on how to accomplish all of those things. My name is Gene and I am co-founder of 
We have over 200 active curators bringing posts to us, and upvote more than 700 posts in most weeks. Then a smaller group of us choose 10 posts every day to include in a daily curation post on
Again, would love to talk to you some more. Feel free to contact me on Discord 
Thanks for all you are doing here on the platform,
Gene
RE: Supporting Steemians and The Steem Ecosystem