There are a few factors you should consider when looking for a budget-friendly home alarm system. 1) Ease of use: Choose a system that is easy to install and use. 2) Type of alarm: Select a system that has sensors on all entry points of your home. This will provide the most protection against intruders. 3) Cost: Shop around and compare prices to find the best deal. 4) Customer service: Make sure the company you purchase from has good customer service in case you have any questions or problems with your alarm system. 5) Guarantee: Look for a company that offers a money-back guarantee if you're not satisfied with the product.

There are a few different types of home alarm systems that you can choose from, and the best one for you will depend on your specific needs and budget. Some of the most popular types of home alarm systems include wireless alarms, wired alarms, and monitored alarms. The best and cheapest option would be a wireless alarm system, which can be installed easily by yourself without any wiring required. However, wireless alarm systems are not as reliable as wired or monitored alarm systems, so you may want to consider a wired or monitored system if you want a more secure home alarm system.