I am an executive of a national construction company with an office in McKinney. This may not be exactly what your son is looking for, but I thought I would share just in case we can help each other out.
An employee of mine got relocated out of town leaving us on the hook for the remainder of his lease until the unit is re-leased by the complex. I'm offering a one time $500 bonus to anyone that signs a lease for their unit (this is in addition to whatever specials the complex is running). This is at The Luxe of McKinney (@ Trinity Falls Pkwy and Weston Rd). I'm not sure they will allow a short term lease on this unit. If they don't, please get back with me, and we might can still find a way to work our a deal.
If your son ends up not liking his internship, let me know!
The link below takes you to the floorplan. Must sign a lease for unit "1306 Makore."
https://www.luxemckinney.com/mckinney-tx-apartments/luxe-of-mckinney/floorplans/b1-willow-1144815/fp_name/occupancy_type/conventional/?fbclid=IwAR3aGGAaTLFgA29estKOb8ZrHR7M4UJ1qwOuT49jYuIJslKdWe9DwHcPMFg[url=https://www.luxemckinney.com/mckinney-tx-apartments/luxe-of-mckinney/floorplans/b1-willow-1144815/fp_name/occupancy_type/conventional/?fbclid=IwAR3aGGAaTLFgA29estKOb8ZrHR7M4UJ1qwOuT49jYuIJslKdWe9DwHcPMFg][/url]