You can register your Wyoming LLC as a foreign entity qualified to do business in Alabama.

Or even STR is also a business. 

Real estate is a people business no matter where you are at the end of the day.

If there are any PA brokers looking for business, please message me.

A move-in ready place with one side already rented is a great way to jump in, especially when busy with your career.

I just wanted to know if it’s necessary to start a LLC before my first deal and have a good business structure ?

This is common during negotiations for proposed business collaborations for projects, mergers, acquisitions and selling of a business.

What is your business model?

unless they are in zoning and land entitlement or land development it wouldn't be developers. if they are that's not a design build firm that's a land development company. make sure to understand how they earn their income and how they come in. how the earn their revenue will be more reflective of what their business is than what they say it is 

I use a simple 1 page purchase agreement that is assignable, I put a 60 business day close, and I have an assignment of contract that I use to sell it.If you would like them, I would be happy to share.Good luck.