I think what u need is how to get money and grow fast question See first continue building until you get half of ur low land with guilds and sub factory that would be like 12 guild and 12 sf when ur done with low lands continue building guilds and explore until u plan to switch to the build u like eg: hansel , attack build etc . When u find friends around the kaw world just call them in to help and grow ur clan by continuesly recruiting I know this is not how you get 25 billion but this way u will not fail in making ur clan successful
If you actually want that money and are prepared for leadership of a clan.. (who's to say you are not, at least you asked for tips).. Then do ebs. Be active, get in items, no-life/xtal (you may want to save them for saving your future clan however). Origins with items can get you 5b easy. 2 a day assuming you have medium activity means you will get 25b in less than a week. In addition to this, volley as much as you can, and don't keep if you're at map. Goodluck getting there. It's very manageable even at your stats, dw