I've tried every real estate strategy and they all work well, but systems need to be implemented in order for them to function with less headache. 

Knowing where you're at in the journey allows you to switch products at different stages (IE at 4 properties, or when you get to 5, or 10, or 15+ and 20+ because pricing/terms change as you progress).I think the local banks and credit unions service another gap as their rates typically tend to be better but there are cons as well such as balloon loan features that require a refi/exit/sale at the end of 5-15 years.Depending on your strategy and outlook weaving different products can help solve your gaps in your strategy going forward.For instance, for me I didnt want a fixed term cash out commercial note so I just did a blanket commercial line across multiple APN# parcels because, we never know when a deal will come up and sometimes having interest charges with no deal doesnt make sense as the funds burn a hole in the pocket so to speak.As soon as I find a property suitable for a project I may use the lines to fund the project with an eventual commercial refinance out when it hits completion in order to pay back down the lines (reload for the next project).

I have a few places that I personally favor and some that I don't - but it all depends on what your goal and strategy is. 

One was really good but he was fired when he DARED suggest to a member to use a different strategy to purchase a property.   

Both tenants acknowledged the situation and complied with the arrangement.This strategy proved effective as it underscored transparency and fairness.

Again if doing a 1031 then they are a great strategy, for starting out, not much flexibility in them and I would go another path of syndication or fund.

So the above, is directly in response to your question/strategy BUT, I would certainly consider NOT SELLING THE LOT NEXT DOOR... especially since you said you're seeking 'additional cash-flow' -- if you sell, it won't be recurring cash-flow instead it will be a one-time infusion of cash into your bank account and then its done AND you won't have much control on what happens next door aside from what restrictions you have placed in the deed... why not instead of selling consider... offering it as a 'ground lease' whereas, the person seeking the lot is allowed to build on the lot but then will pay you rent for the use of the land... this would be similar to some commercial agreements or even mobile homes where the tenant owns the structure but you own the land on which it sits on.. it's also quite similar to how McDonalds and some other franchise businesses operate it's how they are able to ensure that the properties being built are built and operated in accordance with their vision, if a tenant does not build it or operate it 'correctly' then the Landlord will have leverage in ensuring that it is rectfied... because after all you do still own the land and may terminate lease if the terms are violated. 

My cash in was 1/2 of all the cash I had at the time: $5,000 for working capital.After my “subdivide and conquer” strategy described above, I sold a 1/2 interest in the property for $125,000, paying off my credit card debt and putting $90,000 cash in my pocket.  

I'm not sure if that changes your strategy, but thought it might be helpful as you look at AZ. 

I am considering buying a few multizone minisplits and placing the heads in the bedrooms, kitchen and the living room.My question is will this strategy work?