The "Federation of Bed & Breakfast" publishes the (very extensive) list of this members in Gent here: www.bedandbreakfast-gent.be/taalUK/intro.html with click-through (attention: when you click a selection the details are displayed underneath the list, not in a new window: if you have a small screen, you will have to scroll down to see them).
I am pretty sure you will find something to your taste: studios, flats, appartments, rooms with private kitchen/kitchinette, at very reasonable prices and very well situated right in the center of town: no need for taxis or public transport: you step out of the frontdoor and you can start your sightseeing, saving time and money.
Gent is ideally situated: right in between Brugge and Antwerp so day trips (by train Brugge 1/2h, Antwerp +/- 45 min.) are very easily done.
Good luck and enjoy you stay in Gent.