Starting a car rental business can be a profitable venture if done correctly. Here is a step-by-step guide on how to start a car rental business and market it effectively:

1. Research and Planning:
   - Conduct market research to identify the demand for car rentals in your target area.
   - Determine your target market, such as tourists, business travelers, or local residents.
   - Analyze the competition and identify their pricing, services, and marketing strategies.
   - Create a business plan outlining your objectives, financial projections, marketing strategies, and operational details.

2. Legal Requirements:
   - Register your business as a legal entity and obtain the necessary licenses and permits.
   - Check local regulations and requirements for operating a car rental business.
   - Acquire appropriate insurance coverage for your vehicles and business operations.

3. Vehicle Acquisition:
   - Decide on the types of vehicles you want to offer based on market demand and your target customers.
   - Purchase or lease vehicles suitable for your business, ensuring they meet safety and maintenance standards.
   - Consider the specific needs of your customers, such as offering different vehicle sizes or specialized vehicles.

4. Establish Rental Policies:
   - Develop clear rental policies covering aspects like rates, reservation procedures, age restrictions, mileage limits, fuel policies, and insurance requirements.
   - Create rental agreements and contracts that protect both your business and the customer.

5. Online Presence and Marketing:
   - Create a professional website that showcases your fleet, services, pricing, and contact information.
   - Optimize your website for search engines to improve visibility.
   - List your business on popular travel and car rental websites like Expedia, Kayak, Rentalcars.com, etc.
   - Utilize social media platforms to promote your business and engage with potential customers.
   - Offer online booking options and provide secure payment methods.

6. Local Marketing:
   - Advertise in local directories, newspapers, and magazines.
   - Distribute flyers and business cards at tourist information centers, hotels, airports, and other relevant locations.
   - Establish partnerships with hotels, travel agencies, and event organizers to gain referrals.
   - Offer discounts or incentives for repeat customers or referrals.

7. Customer Service:
   - Provide excellent customer service to ensure customer satisfaction and positive reviews.
   - Offer 24/7 customer support and emergency assistance.
   - Maintain your vehicles in good condition and ensure regular servicing and cleaning.

Remember, it's crucial to adapt your marketing strategies based on your target market and local conditions. Continuously monitor and evaluate your marketing efforts to identify areas for improvement and adjust accordingly.

Examples and references:
- Enterprise Rent-A-Car: https://www.enterprise.com/en/home.html
- Hertz Car Rental: https://www.hertz.com/
- Avis Car Rental: https://www.avis.com/
- Budget Car Rental: https://www.budget.com/

These established car rental companies can serve as references for best practices and marketing strategies in the industry.