Accessing Equity in SFRs?

[Deborah Smith]

I have about $1M equity tied up between 4 SFRs, and am looking to access about 30% of it to continue growing the portfolio. The only option I've found so far is to cash-out refi two of the properties. This is less than ideal since they're <4% interest. Do I have any other options? So far not finding anyone that will do a HELOC or 2nd Mortgage on investments.

Thanks