It sounds like the sub trades, particularly a site work sub contactor and a plumber who does underground work/utilities is what you are seeking.

Getting the foreign tax credits is complicated and they are not dollar for dollar credits.

@LeNelle Parker-Sims welcome, but understand we like to have a little fun with newbies that intro themselves like this is a dating site:https://www.biggerpockets.com/blog/2015-04-01-biggerpockets-love-dating-site-real-estate-entrepreneursPlease ask specific questions we can help you with!

Most of the sites I've found seem to be more targeted towards investors, and not the person bringing the deal opportunity.

I have failed with the google docs method and my last time tracker was too complicated for that I needed.

this is not a serious forum/site anymore.  

A little bit about me, I lived in a small town near the greater Boston area for the past 10 years and had just moved to O'ahu to pursue my Masters in Architecture, (but that's kind of on hold right now due to complication of the program...).

Are flat-fee MLS sites or otherwise free listing sites like Craigslist the only options?

Some sites will just send something like no information available.    

Aside from Bizbuysell, loopnet, crexi, and Horse & Hearth, what other listing sites have campgrounds and resorts for sale on them?