It could be a second, HELOC, HOA or tax deed all of which do not give you full possession of the property without clearing the typically more debt on the first position mortgage. 

Quote from @Danielle Robinson: Hello,Are there any experienced investors who specialize in retail that are open to discussions on how to get started?

So, for example, if you’ve managed to secure possession of a self directed IRA or Solo 401k, with a large amount of capital in it (through Roth gains perhaps), you can purchase your real property, notes etc. through a series LLC owned by the retirement account.  

These guys are an investor-friendly title company that specializes in wholesale deals.

Westchester, NY, is a highly competitive market with numerous investors possessing substantial cash reserves.

Bigger Pockets is a great place to find an accountant specializing in real estate taxation.A good real estate accountant can save you thousands of dollars by leveraging entity selection and formation, tax deductions, cost segregations, bonus depreciation, 1031 exchanges and tax planning.I recommend finding an accountant specializing in real estate taxation, business taxation, financial planning and tax planning.Consider working with your accountant remotely to expand your options.I would also recommend looking for an accountant willing to work with you throughout the year.

@Cecilia FieldsBigger Pockets is a great place to find an accountant specializing in real estate taxation. 

I suspect if folks are still living there NO WAY you can require them to let folks in prior to one taking possession and the folks moving out..

Can someone recommend realtor(s) who specialize STR in Dallas Fort Worth area and familiar with regulations etc?

My brokerage is located in Katy and we specialize in working with first time investors.