If you are worried about out of pocket costs, see if maybe a rehab loan is an option to get everything needed done now and refinance in 3 months when everything is complete.

I just did this with a 4/3 new build out in Cape Coral and a construction to perm loan through the bank.

Alternatively, your sibling might use a 1031 exchange to defer taxes by reinvesting in like-kind properties, though this doesn't directly fund a primary residence.Other ideas include leveraging a HELOC on the rental properties for the down payment, taking out a 401(k) loan, structuring an owner-financed agreement, or a lease-to-own arrangement.

Loan: 20% down, $4,038/month PITI.

One solution could be a Debt Service Coverage Ratio (DSCR) loan.

Real numbers- purchase 907k,rehab , closing costs, soft costs, 840k, all in 1.747 mil, basis for each unit should be roughly 291kappraisal of each unit minimum 400k , so 2.4 mil if for all 6.I might refi only 4 out of 6, that will cover initial loan amount.

There’s not a ton of margin to play with these days when you’re financing everything on a flip on hard money loans.  

And you have to pay PMI for the life of the loan.

If I find a deal on an area I would consider living when I move back I would like to be able to pull the trigger and possibly refinance into an owner-occupier loan once I move back to the US.  

Whatever you do, leverage smartly—DSCR loans can help you buy more without draining your cash, and depreciation will handle your tax burden for 2024.