HELOC for flips/ HEL for rentals?

[Joe Boggin]

one strategy i have to secure retirement income is to secure rentals...now. if i can have 10 rentals without a mortgage before im 45 yrs old i will be a happy fella. i have my first unit now...free and clear. instead of saving to get another rental i would rather tap into my equity in some capacity.

i was thinking using a HELOC would be better served if my agenda was to flx and flip. my reasoning is that it would make sense if you plan on keeping the unit for a short period of time. obtain the line of credit, buy, fix, sell...repeat. the only gamble with this approach is the timeline for the final sale. it could take three months to buy and fix but if the home sits for over a year then one would suffer a variable rate increase??

on the other side, if i were to get a home equity loan with a fix rate, one would be able to buy and hold as long as there is enough margin to cover the debt service with rent.

how would you approach a strategy if you were planning to obtain multiple rentals and not the fix and flips??