@Julian JosephNot hotels, but apartments, condos, and homes - anything you can sign a lease with really. 

Will I need an attorney to switch the lease into my name?

I expect a reasonably higher rent per square foot in the area.So, I just need some advise on how to create the lease.

Employers do take advantage of that to lease smaller office space in better locations. 

We found out the person on the lease broke up with her boyfriend and moved out.

In both cases, you can still include clauses that essentially say if the animal causes issues on or with the property or with other tenants, that it can result in termination of the lease. 

Do I need them to sign a new lease for June and the rest of the July or will a 39-Day notice be enough since I already have rent payments and the security deposit? 

Store this event in your mind and if she pulls any future shenanigans like this then don’t renew her lease 

My lease ends in March '19, and I'd like to determine the viability of the following "live-in flip" plan from experienced investors and lenders in DFW:1.

  $50k in my market will get you one SFR that you can buy, hold and lease out.It will be hard to buy into this market and make a lot of money today.