Often, I have cash sitting around between opportunities and have looked all over for a bank that will hold the cash in some kind of interest-bearing account.

Recommended Long term rentals are the way to go at first, Medium term and short term are strategies to look into though once you gain your bearing.

does a bear go potty in the woods ?? 

Same goes for number of LLCs and what to fund them with, since bear in mind that CA tends to be more cumbersome and expensive to have LLCs than other states.California is generally more cumbersome than other states when it comes to taxes and filings.

., constructive receipt doctrine, effective control over nominal 3rd party relationships, lack of genuine risk bearing and compliance with transactional terms, etc.).

My thought is FLA is sandy soil and you simply dont have as much problem as other areas.. its very cheap insurance for a buyer.. and now a days 10 to 20k to replace the line is kind of the going rate..

You should be. Are

Preferably, buyers would directly bear the cost of their representation. 

I have started soil tests on 12 lots costing me a total of $5340 for the permits.

In your new hole, supplant with a high quality mulch soil mix.