In the process of BUYING a PURE Option to buy a SFH subject to an existing loan (at a lower fixed long term interest rate)Let say the OPTION "Strike price" to BUY the property IF or WHEN the OPTION is EXERCISED is $300K The seller wants $60K to sell us the OPTION. 

In that asset class you are depending on things to save you that are trending against it.That said if the 30k completes a partial done rehab it might make sense but if it's a purely cosmetic one I would sell it now close to as is.

(Also, the developer is reasonably experienced + wealthy and has personally guaranteed some of the existing development projects - but wants to move away from that)I'm also planning to get some equity in the JV / the broader development company (much less equity than if I were to be a pure equity investor of course). because I do think this could scale to 300-400 homes / yearOf note: These homes are modular in nature - so are faster to build and margins are projected to be attractive.My questions for you all is:Have any of you lent to development assets with cross-collateral from cashflowing properties like this?

https://www.biggerpockets.com/blog/short-term-rental-loans-a...High Level --Conventional will typically offer lowest rates/fees but harder to qualify, especially if you are scaling and past the first couple of properties or going for the high-end of the market-2nd Home (10% Down) - should be very careful here - these are not intended for STR properties and people using them for pure investment properties are entering dangerous territory (you are attesting to use it as a rental half the year or less, no management, need to live in proximity, etc.)- DSCR Loans - typically your best bet if you don't quality (or have "outgrown") conventional or looking to scale a portfolio or diving into more specialized markets. 

But since private money is relational based versus purely collateral based, you'll need a track record to prove yourself.

I think the new lodging will be great but the newest builds are very very expensive and I suspect will be purchased more for second homes than pure investments.

Pure spam...They overdid it now it just ticks you off in every possible way.

Is this a pure investment for rental? 

That doesn't necessarily translate in high real estate investment returns but you can make some money investing in real estate there (like it seems you do) and so it makes perfect sense that you do that since you live there.Those like me who don't live in Panama are likely purely looking at figures and comparing risk-adjusted returns with other countries where they can invest.

You're starting early so weighing more on appreciation than pure cash flow will likely pay more dividends on the exit.