I work for a real estate investment consulting company in the Caribbean and we have a few interesting projects, can discuss with you, different types and most with owner financing. 

And they offer a free consultation, so you could ask that question during the consultation :)Good luck!

If your agent does not have experience with lease/option arrangements - I would consult with the broker or a lawyer who does have experience. 

If not, it can get sticky and you will want to consult an attorney. 

Have your local solar installer/consultant give you a quote for your potential saving at your specific location.2.

But yes definitely consult an attorney who litigates so you know what that process might look like.

I currently have an LLC for my consulting business  (not real estate) and want to loan my real estate LLc money for purchase and renovations.  

If other businesses have contaminents that have leaked into your soil that could be a huge development problem.You might want a developer consultant who knows that market to discuss further.I know nothing of Washington.

An authorized individual (John, Jimmy, or anyone else authorized by the shareholders of the corporation) would sign the deed on behalf of the corporation.That being said, you need to consult both a good real estate attorney and your tax pro.

I had been intrigued by real estate as an asset class when working in Moscow in the early 90s, knowing many ex-pats who were making large fortunes in the arbitrage of being able to buy buildings for thousands of dollars, spend tens of thousands of dollars rehabbing them and then sell them for hundreds of thousands and millions to other ex-pats and the consulting firms they were working for.