It's much easier to arrange those type of appointments when the house is empty. 

Arrange for time off from work to find 4 condos worth of furniture, linens, digital locks, etc etc etc.

My existing arrangement is great in that the GC is also an agent who knows the area, looks for lots and is involved in both the buy and sell transactions. 

My existing arrangement is great in that the GC is also an agent who knows the area, looks for lots and is involved in both the buy and sell transactions.

I have worked out an arrangement with an agent in the office of my previous state to share certain tasks that I am unable to perform, since I am not physically there at the moment. 

Do I trust them to make the most responsible call when it comes to repairs or should I arrange it? 

I would allow him to arrange with your repair person to fix the issue and make clear he pays for after hours charges if they apply.

Maybe even diversify and do both.You could fairly easily net your buddy $240,000/yr cash flow on that sum(this is very conservative), show a paper loss on that sum yearly, plus benefit from forced appreciation that will likely outpace the speculative appreciation in most markets; all while barely lifting a finger.Of course you’d no longer be managing that large sum, but I’m sure something could be arranged for your mutual benefit.

The lender for the acquisition has been arranged by the builder. 

This gives both you and the tenant an easy to budget mark.I would write up an addendum to agree to this arrangement.