Sounds like she's already an established landlord so conventional lenders should be counting the income from each property she buys right away.

Eliminate debt, establish a budget, and save.

Does he have any established US credit?

Here’s the plan I’ve come up with, and I’d love to hear your thoughts on its feasibility, potential risks, and any improvements you might suggest.The Plan1.Pay Off Mortgage: I currently have $170K left on my mortgage, and my goal is to aggressively pay it off in the next 1.5 years.2.Establish Emergency Fund: Before making any big moves, I’ll set aside 6-12 months’ worth of expenses as an emergency fund.3.Extract Equity: Once the mortgage is paid off, I’ll pull out the equity from the property.4.First Flip: Using the extracted equity, I’ll purchase another house, fix it up, and sell it for a profit.5.Reinvest Flip Profits: Instead of buying another property immediately, I’ll use the profits from the flip to renovate the original property, aiming to increase its rental income and appraisal value.6.Reappraise and Extract Equity Again: After renovating, I’ll get the original property reappraised and extract additional equity based on its increased value.7.Purchase Rental Properties: With the additional equity, I’ll start purchasing rental properties that offer positive cash flow and have growth potential.8.Leverage Equity Strategically: I’ll use equity from the original property and any new properties while maintaining a healthy loan-to-value ratio (LTV), ideally around 70-75%.9.Build Rental Portfolio: I’ll focus on acquiring a mix of property types (e.g., single-family homes, multi-family units) to diversify my investments.10.Focus on Cash Flow: I’ll prioritize properties that generate consistent positive cash flow, ensuring that rental income covers all expenses, including mortgage payments, maintenance, and management fees.11.Long-Term Hold: I’ll hold properties long-term to benefit from appreciation and tax advantages.

Set clear expectations and establish a process for addressing concerns and updates.

I think many folks getting established simply may not have the cash.

This circumvents HR, which usually just sends me to The Work Number, one of the most useless companies since the establishment of western civilization.

I thought of banking on appreciation and rate drops as pure speculation and akin to gambling.

As you get further away from standard real estate practice, the risk is increased by a “legal” risk that your protection may be interpreted quite differently than you expect by a court and that the subtleties of the protection a mortgage or trust deed document provide with established law and court decisions handed down for (in the U.S.) 250+ years is not existent. 

Plus, older properties in established neighborhoods often have more stable appreciation over time.On the other hand, the new development, though slightly more expensive, might offer modern amenities, energy efficiency, and potentially lower maintenance costs.