score:1
The question is probably to broad, you should define 'near', 'reasonable', and 'comfortable' a bit more specific.
If you look at hostels, you can get several to chose from for under 20 $, most are towards the beaches, about 10 miles from the airport.
If you want a class up, like a Motel 6 or similar, they start around 60 $; some are less than 3 miles from MIA.
Some might have shuttles, or you can Uber or rent a car, and that each costs different.
Weekends and seasons will change that, upwards of course.