HELOC is a variable rate line of credit (so you only make payments on what you have drawn), HELOAN is a fixed rate lump sum loan (similar to your first mortgage).

Amazon algorithms are quite variable and can change prices and availability in a matter of seconds.

I think it becomes hard because of the unknown variables of time toward money output and also keeping up with the laws as they are constantly changing.

Most importantly, it helps you future project anticipated equity, cash flow and net worth based on whatever variables you want to input for things like appreciation, rental increases, loan terms, etc. 

Any other variables I'm not looking at? 

For instance, my properties run about 1,500 in operating expenses, but its variable based on factors like seasonality.

Sometimes, when I buy a property, I am ok to have a short-term lease with the owner until they move out, but I agree that there seem to be too many variables right now that add uncertainty to the deal.Is the Title clear?

We moved out in June 2023, and since then, I've been renting it out, generating around $1,450 in monthly cash flow, not counting variable expenses.

The maintenance and variable costs you referenced above would not fall under closing expenses in the above sentence.

There are many variables of course such as the type of loan you qualify for on the exit and debt service.