Looking for advice on my situation: I'm in NJ for 2 months and need a car. My daily commute would be around 15 miles round trip. I was able to find a combination of CDP + coupon that lets me place a reservation on an ECAR for $575 a month (ICAR is ~$100 more per month).

I have never rented for this long, so a couple of questions. Are Hertz ECAR/CCARs reasonably maintained? Back home, my Hertz location always gives me nice upgrades so I've never received a E/C, but this is an HLE and most likely I won't get any upgrades other than probably to a CCAR. I'm told that the E/Cs are most abused ones so finding a good E/C is hard. If I don't like the car I get, can I ask for a bump to an I/F for the same rate code as I book now? Can I do this switch a few days into the reservation or do I have to do that when I get the car initially (because I won't know if the car is good enough for my commute until I try it for a day or two)?

I did think of breaking up the reservation. However, there is a $5 per day domestic security fee in NJ for a max of $140, so if I break up the reservation I end up paying more.

TIA!