How can I get enough space for a service station? There is nothing here.

Start by looking for reasonable spaces for rent or sale which you can occupy for such a business with a good source of water or water availability and then apply for a bank loan. Location is very important with car washes -- it needs to be accessible to many people. Perhaps look for old houses or offices that are now unoccupied to demolish and gain an excellent site position or talk to your local municipality and real estate agents about what is available in the area you're keen on starting up. Another option is to talk to existing car wash places in case someone is nearing retirement or wanting to sell on.