Should I use a heloc on my property for a flip !

[Jerryian Francois]

Hey bigger pockets happy holidays to you all I really need some advice here !  So it’s been 3 years since I brought my first duplex @415k its now build up equity and is worth over 540k so I have equity in it a refinance doesn’t make sense because I’m locked in at a low rate but I do t want to wait until rates drop to get back in the market I’m wondering should I tap into that equity via private money heloc and use about 30-50k to get into a flip deal the lender is giving 2 years to pay back the heloc ! Would love to hear from you guys !? Thank you in advance