Home line credit to pay off mortgage or buy another property

[Enkhmanlai Enkhbaatar]

Hey guys, so i bought my first property last year of October on fha loan for 86k. Its old house 1956 i think with a lot up dating to do. So far i put in 10k remodeling. I live with my grandpa and pay 300 for rent and my mortgage is 700 on my first property. It has been empty for almost year because of fha loan requirements but been paying utilities show i been living in there. I have been dyi all my repairs this whole year and been learning a lot. So October is almost up to rent my property and my mortgage is now 76k. I was thinking of getting a home line of credit to pay off the mortgage faster but other thought i was to buy another property with conventional loan so i can rent right away. My wife thinks we should flip on our second property if we see good deal. What do you guys think i should do?

Thanks for any replies.