what can i do with a $250k heloc? can i use it to flip a house?

[Michael Lozana]

I currently own a duplex and have one side rented on airbnb. I'm living on one side and renting the other on Airbnb.

Mortgage is $2k per month and airbnb is generating $3500 gross per month. 

the bank just approved a heloc for 250k. Is there any way I can invest that in something? 

can I buy a house with it and flip it? if I can I'd like to remodel most of it myself. 

or are there better ways I can invest it?