You can choose Pinnacle Holiday Homes Goa
The person has two properties. One is in Saligao goa. which is very cheap around 1500 rs for 2 with breakfast, The rooms are very nice, big, clean, breakfast is also nice. plus the host is amazing. https://pinnacleholidayhomes.com/
contact him for saligao property.
Do opt this if you have a self driven car as the house is 1km inside of road, so coming late night should be precautious or try with a group.
If you are traveling alone then I must suggest you should opt for hostels. These hostels are quite cheap. Traveling gives experience therefore it will be quite a good experience for you to know people over there. You will find cheap hostels near beaches. I stayed in Candolim beach and I got quite a nice deal. These hotels are near Cafe Coffee Day in Candolim Beach. You can book from Oyo as well to avail reasonable deals. Two hotels nearby Down Da Village Greenfield View P.S try to avoid going now for extremely hot weather.