I'm really flexible to accommodate your rental needs and welcome long-term rental. While my car is older and has obvious wear & tear, it is very well kept and clean. Before my car is rented out, I wipe down the driver seat, break handle, steering wheel, dashboard, etc. with Colorox wipes. I also leave hand sanitizer and a iPhone 4 charger in the car. My car gets incredibly good mileage: ~ 28 to 35 mpg depends on how you drive to make it economical.
Since the car is older, I prefer not to rent out to those who are looking to take long road trips (150 mi plus) but great for daily shorter commute to work, etc. Recently, one of the rentees on RelayRides provided the feedback that the break makes squeeky noise, I've had a professional mechanic to look over and it operates safely. Other than that, the car functions 100% and I've never received complaints.