If we want to mine Bitcoin for ourselves for example, what would be the payout for 1 year assuming BTC price stays at $2,500 and we have 10,000 tokens?
Giga Watt has a calculator
https://giga-watt.com/promo/prices on the website which computes approximate earning within the following year; however it does account increasing mining difficulty, so we wouldn't be able to answer your question with precise number.
Is the "efficiency" (or $14,292) mentioned in the picture below the return from mining? Let's say I have 2,928 tokens, what are the additional costs that I need to bear for mining Ether in the example shown in the picture?
Also, in the picture above, it says that the annual hosting fee is $1,158. However, in the picture below, it shows that the annual hosting fee saving for 2,928 tokens is $1,731. Could you explain the discrepancy?