The budget will vary depending on what kind of accommodation and way of travel you choose. Remember that Goa has no Ola and Uber. (I know it's sad). The taxi services here are quite expensive. I would suggest you rent a 2 wheeler or 4 wheeler depending upon how many of you are visiting. It is way cheaper.
Hello and apologies for the late reply. If you are a party person, id suggest you visit North Goa. Also note, North Goa is very much crowded with tourists. If you like the calm and relaxing nature, kindly head down South.