How to invest with $560k HELOC

[Tony C.]

I checked with my bank and I should be able to get a new $560K HELOC on my primary home. I would like to get some advice from BP about the investing strategy using the HELOC. I am in 40's and pretty busy with my current job, so I do not have time to spend too much time fixing the houses. My local market is strong, but it is not in metropolitan areas. SFHs and town homes are more common here than multi-family or apartments. I have already had invested in 2 townhome properties with my own capital. and the gross yield is 5-6%. With my new HELOC, I am not sure if there are other options I can do to earn a higher gross yield, say 8% or above on the purchase price. My HELOC rate is prime-0.14% i.e. 4.36%

How would you invest if you are in my situation?