It might be worth looking a some of the guesthouses here? Not all are in Candolim
http://www.goaholidayhomes.com/guest-house-in-goa.php
I've seen this one, although not stayed in it, and it looks very tidy
http://www.coqueiralholiday.com/
I have stayed in a seaview room at Shanu Holiday Home, right on the edge of the beach with balcony but the Calangute end of Candolim (so maybe not where you want to be), and this was clean, reasonable and spacious (not all roooms the same size). No pool, but it's a few steps to the beach, so fine by me. To get to it, is down a lane opposite Lawande store.
Escrivaovaddo, Candolim
Tel.: 2276899
Fax: 2279609
Don't what budget is what you're looking for.