Quick search "MLS Only Broker California" gives you a couple of options.

I'm happy to discuss it further with you (I have appointments this morning, but will be back after lunch) and there are a ton of options now.

Use extended closing periods or additional earnest to buy more time for your old property to sell if you need.The last option is what's called a reverse exchange.

I have a STR in the Sullivan County and have been looking for a cleaner but the options seems to be limited in this area. 

The "non conforming" lending options are actually called NonQM (non qualified mortgages).

Seriously, looking back, my life is full of numerous examples of things that were labeled as impossible, or impractical, but I somehow managed to pull them off.

IMO, at least for now, the best option is to use stablecoins.There are a few different types.

I've found options in Costa Rica, but rates are in the 10% range.Does anyone have any experience or guidance on obtaining a mortgage equivalent to purchasing a 2nd home in the US?

Have you also looked into other funding options?

These programs offer options for less money down and in some cases DPA - Down payment assistance.As a banker for over 18+ years I am very skeptical when I hear a new name in the business only because its become tougher to lend with all of the new laws and credit/insurance requirements and regulations.