What I like about the HELOC regardless of whether you use it or not is that it doesn't cost you anything to have(besides a nominal setup fee usually) but then you are able to use it at your discretion.

All members pay a nominal membership fee and agree to a membership agreement. 

Meaning you lost money in real and nominal dollars.  

So their income will not change except for COL adjustments which are nominal usually.

And, has anything resulted in a transaction for yourself and/or compensation for my work; which could be nominal considerations.

There may be some sort of central lighting you will be responsible for or if not you will need to factor in some amount like $7/month for electricity for when one of your units is vacant because the electricity when a unit is vacant should automatically transfer into the landlords name either for free or for a nominal cost whereas turning it on and off may cause pipes to freeze or mold to form and usually costs $100 and can take up to 3 weeks which is a problem if you want to flip your unit in 5 days.

There are also service you can contract with that will charge you a monthly fee plus a nominal per minute charge for live operators utilizing your srcipts.

But I think it's somewhat more likely that rents (and taxes and energy and other carrying costs) all go up while home prices continue on as "normal" in nominal dollar-denominated terms.Hope that helps!

Though I don't believe consumer prices will ever recede back to pre-pandemic levels, wages continue to increase https://www.epi.org/nominal-wage-tracker/and inflation is receding and we expect a series of fed rate cuts over the coming year, so although this should be sufficient to prevent recession, the reality is that we can't predict this with 100% accuracy.

The baseline management charge (for handling rent, tenant communication, emergencies, etc) should be pretty nominal.