Before you do that, install some passive roof vents or an attic exhaust fan on a thermostat switch with a passive intake on the other side of the attic.  

I have to agree with @Roy N.. i provide free Internet myself to my student rentals ( i also control the thermostat and door locks if i have to, from my house - which includes changing the door code with new students, front door only) its a convenience for them and me and helps rent it. as for my other properties i do not provide that service, the tenants pay for that service themselves.

Even as a precaution, the thermostats for the heat are programmed not to exceed certain temperatures, so that is controlled to an extent as well.  

I'd include utilities, because otherwise there will be bickering about who is using more electricity or changing the thermostat, and how it's not fair they all have to pay a percentage of the bill, yatta yatta.I'd also pay someone to come clean once a week, because that will be another argument about who has to clean the bathroom and who doesn't do a good enough job of cleaning, etc..  

We have several student accommodations and the prime lease-up windows are late February - April (for those who are very organised and looking for a lease starting in May or September) and June - July (for those who are less organised, or were accepted in to a programme last minute).

If it's not cooling properly, it's either the fan or the thermostat (most likely).  

Knock on wood I have never had a problem with them doing anything other than using the toilet and leaving lights on along with the occasional thermostat that gets changed to see if the furnace works.

I was first notified by text today, on a Sunday afternoon at 4pm, no one is available today - not the two HVAC services I have existing relationships with - the earliest I can arrange something would be tomorrow, plus, it's pouring rain outside.I'll admit, it's hot out in South Florida now, weather.com says 80 degrees, it's 84 degrees inside their home as reflected by their AC thermostat.

If so, require that the new tenant(s) provide(s) proof they've placed the utilities in their name(s) prior to giving them the keys.If the utilities cannot be attributed directly to a tenant, then you will most likely need to bake them into the rent.Another alternative we offer to our student tenants is a utilities budget programme whereby they prepay the utilities each month; we provide them with a copy of the utility bills; every quarter we reconcile.  

Most of the arguments will be over cleaning and stealing food, and wanting space in the kitchen at the same time.I'd also include utilities in the rent, and if you have to put one of those covers with a lock on the thermostat, so be it, but if you do the split the utilities thing, they'll argue about that, too.Just eliminate as many things that will cause arguments as possible, and just do month to month contracts for each separate room, is what I suggest.Because it's really a mess when a group rents and one wants out, or they all want one gone and they can't get rid of them.