@Nizar Basma Considering that you will be starting out on a small scale and would likely not want to drop large amounts of money for this data, I included a few links below where you can get good market information for free. We use CoStar and Axio for our market data, which is very robust data, however it would be too costly to justify these sources unless you are investing on a large scale.
- The Census Bureau could be a great source for you for all economic related fundamentals: https://www.census.gov/quickfacts/fact/table/atlan...
- Trulia will be good for school ratings: https://www.trulia.com/
- For real estate value and rent/income ratio's - the large commercial brokers do research on these types of things and have reports available online. Here is a link to JLL's research: http://www.us.jll.com/united-states/en-us/research
- To keep yourself up to date on whats happening in the markets you can subscribe to Biznow updates. https://www.bisnow.com/ . You can customize these emails based on city, type of news you want to receive, and how often you want to receive. This will be very beneficial in making sure you are up to date with trends that will affect your investments.
Finding agents/brokers and property managers will come down to who you decide to trust. Maybe do some google searching or start a BiggerPockets forum asking for advice on who people feel to be the "best" in certain markets. You could then contact each recommendation to start to build a relationship and continue on from there with who you feel is the best for you and the particular market.
Something else to consider is that "do-it-yourself" real estate investing can be time consuming and cause many headaches, especially if you have a day job to tend to. Based on your real estate investing goal and the fact that you do have a day job, have you considered passive real estate investing with partners that manage the investments full-time so you don't have to? The perk of this is that you are leaving it up to experienced real estate operators while still get very comparable, if not better, cash-flows and returns without having to worry about spending the time and effort to make sure the investments perform.
-Vince