My HELOC (through my credit union) was for 15 years, and I purchased properties with it.... paying them off asap (principle & very low interest rates) fwiw. I don't think you have to worry about high rates for a looooong time.... cheap, easy, credit has become "the path" the FED has been forced into.... like it or not, and I don't
. I would not over extend and leverage too much however.... just not my thing. I'm a novice.... but that's how I've done it...YMMV.