Which is the best free host to use for making money?

Wordpress is the best platform for a blog. Best website platform is coding yourself or using xsite. For a website to appear in the search results the platform does not matter Search Engine Optimization does. You can spend a lot of money on a site but if you're neglecting SEO everything is a waste.

Its not very important which host you use, it depends on SEO. Submitt your website URL to search engines and wait till they crawl your website. Get more and more backlinks and increase your PR and SERP. Publish unique and usefull contents, definitly your website will appear in search engine.