Micro Niche Website

If I am going after a micro niche in localized markets and I want to use the city and key word terms in the domain will this get indexed the same?

example:

gasgolfcarts.com/miami-gas-golf-carts.html


Do i need to ping each .html?

How can I get this link indexed?

What daily maintenance needs to be done to get higher ranks with URL's like the one below?

Thanks a Mili