Vijay,  It all depends on the location of the lot. 

Depends on what kind of property you are operating.

Depends what tracker you're using, for example the federal MORTGAGE30USmay be available, orI:US30YMR

A fair way to compensate your financial partner typically depends on the agreement you structure.

Of course, with all things, the answers to all these matters will depend on the circumstances.California tends to have more laws on the books and requirements and restrictions that it can be a good idea to form a CA LLC for out of state property so that you as a CA resident are covered, and to try to have your contracts fall under the purview of CA courts.

Although it also depends on your projected usage and average length of stay.

This is networking, tapping your current list of friends, family, co-workers, other real estate investors, etc.Ideal duration depends on business plan: I, personally, am a fan of long-term fixed rate loans.  

Anything from REIT mutual funds to direct ownership (which depending on your definition is "passive" to many, including the IRS), to direct asset syndications and funds.  

The smart play would be to build a two story wood frame structure on top of piers or concrete block in most cases. 35 feet is a pretty typical height limit in most neighborhoods, so depending on elevation you SHOULD be able to build two stories on top of the elevated foundation.

HEy, I am living in Poland now, this permit should not be too difficult to get depending on what type of investment!