Is there a company that you can recommend that can search existing data to find the information for multi families?

You can search this forum for flippers Example https://www.biggerpockets.com/search/topics?

You should connect with a structural engineer to take a look.

Do I need to have a team in every area I'm searching or is there a better way?

Start by going to www.narpm.org to search their directory of managers.

I don't know anything about these companies but a quick google search suggested Browning-Gordon & Co, Renters Warehouse Nashville, and WH Property Management.

You can also check meetup.com or search Facebook for real estate investment groups, clubs, or meetings in your area.

I'm part of group real-estate  investors from Israel, looking to purchase our first investment property in Dallas for buy and hold.We would love to connect with local real estate agents, investors, and property managers who can provide recommendations for good Dallas neighbourhoods and suburbs to look in our price range of $200K - $250K.As first-time buyers in the area, we would really appreciate any advice on great areas to buy rental properties and also any tips on evaluating properties and neighbourhood in the city.Does anyone have suggestions on specific suburbs or zip codes we should focus our search on?

Get a good structural engineer and work with the county with permitting.

Zillow etc.. are just as good, better in some ways like search and pics.