Sort:  

It depends on what you need it to do.

I want to receive information directly from the blockchain

if its a private node maybe $70-$120 a month each of our node servers cost around $200+ each a month. If you good node set up guide for steem many posts.

And none of them except @furion post works well. You don't need 200+ for a month to run full RPC node but its desirable to have a seriously good bandwidth and 2 x high I/O rate on SSD drive 250 GB setup in raid mirror, with low as 8-16GB of ram.