Save hard, then save even harder, so you can accumulate enough capital to take the plunge. 

2 - How much negative cash flow would have been accumulated when this event finally takes place?

We also found we were depleting our savings putting 20% down per SF house, and the market recovery meant that savings from our jobs and rental property cash flow was taking longer than we liked to accumulate to the point we could move on the next, more expensive, SF house.

Use the savings to accumulate another down payment quicker.

Likely, it is a better time to be accumulating cash then trying to deploy at or near the top of a market.

Next is to take stock of your goals (for example, accumulate wealth for retirement, quit your job, etc) and be able to articulate them clearly.

Overall, my long-term goal is not to accumulate a bunch of notes backed by class D neighborhoods, but for the moment, my interest is to find a note with a lower UPB to be a learning experience while keeping exposure down.

It's not all just about accumulating money as quickly as you can by any means you can for everyone.

With each property purchased you'll accumulating acquisition funds faster and faster.In this long-term safe strategy, keeping your expenses low while you're income is increasing is important!

If you are starting out and need to accumulate capital or want to become financially free, I think it's a great place to start.