Here are some financing options to consider:HELOC or Cash-Out Refi on Another Property – If you or your mom have equity elsewhere, this could be a more flexible and lower-interest option.Business Line of Credit – Since the property is in an LLC, you might qualify for a business LOC, which could cover construction costs.Private Money Lender – If you’re okay with 12-15% rates, a private lender could fund this as a short-term loan, especially if the guesthouse will generate strong income.Construction Loan – Some lenders offer short-term construction financing, which converts to a longer-term mortgage once completed.Seller/Partner Financing – Bringing in an investor or structuring a joint venture with someone willing to fund the build in exchange for a share of the income.Credit Card Stacking or Unsecured Business Loans – Riskier but could work if you need to bridge a gap until the unit starts cash flowing.Would love to hear more details—especially your timeline and expected rental income.

When I did my research for buying my properties in Costa Rica, I had one of the big STR management companies like Evolve analyze my potential profits and I used that info to raise money through bringing on partners to buy the properties. 

I do my best to be the intermediate between the consumer and the seller, simply by bringing awareness to a buyer's potential.

Or they bring a deal that professional acquisitions teams already know about.

Do I need to bring my own funds in any way?

I’ll bring it up with our tech team. 

He knows local investors to bring me bids now that property is cleaned out and cleaned up.

Why PM does not inquire to bring potential tenant to view occupied property upon tenant agree?

You might as well start now in case they suddenly bring up the 3-6-12 months notice required to leave them. 

If this stretches to 9–12 months, holding costs could climb fast.I like your point about tightening the rehab costs, I think there’s room to bring it closer to $100K with the right contractor and materials.