I have personally installed a medium sized system on an Off-Grid vaction home I have and it is a real life-saver.

@Sean Nava  If you haven't considered a cost segregation study yet on any of your investment properties, you are leaving a lot of money on the table.

You're 4x our size, so always looking to learn! 

I'd recommend getting multiple quotes from service providers to see what pricing is going to look like per square footage.Without too much information provided and depending on the size of your home it could be anywhere from $5,000-$15,000+

It would also help if you bring a solid deal to the table in exchange for the learning experience.

I know long time right but I would go to real estate events, REIA meetings so on and so forth, but they wouldn't give you all the information needed only bite sizes so you could purchase their costly programs.

Are you printing standard envelopes #10 etc or do you print any heavier weight or custom size envelopes?

I agree with @Jonathan Greene in terms of having a specific buy box - size, condition, and type of properties you wish to focus on.

If you plan to use Conventional loans, the LLC is off the table.

The FHA househack strategy is fairly common and pretty straight forward, a lot of people have been using this and/or the conventional househack (myself included) so have been on both sides of the table.