For MLS transactions, it'll be expected that you use the specific state's boilerplate realtor contracts.For true(1) off market, or seller-direct, type transactions, you can use what you want, inclusive of a bar napkin that contains the elements necessary for a legal contract (which may have some slight state variance if you're doing something super esoteric, but otherwise probably not).(1) Note that if it's being marketed to you, by definition it is not "off" market.

That's not taking advantage of the most important element of REI that makes it stand out well ahead of any other form of investing. 

Again, the BiggerPockets store has some books for this or you can learn by watching podcasts, reading blogs, and interacting on the forum.

Underground power lines are typically pretty reliable and aren't at risk of having trees falling on them, or being damaged by strong winds, long term exposure to the elements, vehicle accidents, etc.

I also own a Matterport camera which can create really nice 3D interactive virtual tours which is great for rental properties. 

I would also get a copy of their engineering study, which will consider replacement timeframes of common elements previously mentioned and recommendations, regarding cash reserves. 

I think you can tell a lot about how well behaved they are if you interact with them.

Again, the BiggerPockets store has some books for this or you can learn by watching podcasts, reading blogs, and interacting on the forum.

Again, the BiggerPockets store has some books for this or you can learn by watching podcasts, reading blogs, and interacting on the forum.

Again, the BiggerPockets store has some books for this or you can learn by watching podcasts, reading blogs, and interacting on the forum.