If you're eligible for solo401k, then look into that.

If you buy regular keyed locks (non-electronic) as Nathan Gesner recommended, then buy Schlage because they have a lifetime warranty on mechanical and finish. 

Then more issues started to pop up over time. 

No it doesn’t, it’s just how he played the game back then.

Indeed, but you can always get a conventional loan and then swap into an LLC with certain lenders.

We ran supply and return truck line from basement to attic then diffuser in the second floor ceilings. 

Additionally you can always write in what was done to correct it and explain that since then you no longer had issues. 

So an investor buys the property, you pay them a down payment for the lease option then pay rent for a year and after a year you have option to buy it.What makes this challenging is the lease option payment would probably need to be around 20% of the purchase price but it sounds likeyou do not have it. maybe moving is just not in the cards.

My plan is to live there for a year then move out and rent the 4th one.  

What a lot of people end up doing, and sadly I'm prone to this as well, is they spend way more time learning then they need to in order to get their first deal done.