Been listening to the podcast - hopefully that gets you a little $$.
A couple thoughts -
1- It seems like you "took a dump"; instead of "got off the pot" early on. You jumped in quick without knowing or having a clear vision. The negotiations with the landlord should have been done through an intermediary - they would have gotten your place move in ready. The landlord would have been required to take care of the sprinkler system. Its hard to fault the landlord in this situation. He wasn't a partner.
2- From episode 2-5; I kept thinking - what they really wanted was just a place to brew beer and drink with friends. Perhaps they should have just rented a house with 3-4 other couples and just had a good time!
The episode I am currently listening to - prompted me to reply to this thread. I am listening to episode 6- The Landlord episode.
Perhaps it is my old age, but this episode highlights something that is very wrong with the mentality of the younger generation. You had entered into an agreement with the landlord. Then you wanted to change the deal because it wasn't working for you anymore. The episode was devoted to trying to vilify the Landlord.
I get that he has a little bit of a desire for your business to succeed, but not to his detriment.
The whole trying to buy the property for less than market value (or the market value 2 years ago) is mind blowing (in that you got so mad when he said no). The rent that was paid and the improvements done were part of the rental agreement and doesn't have a bearing on a purchase price.
Think about renting a house for 4 years of college. Then at graduation offering the landlord to pay what the home was valued at 4 years ago and taking into account the 4 years of rent payments. a landlord/ property owner who thought they could get a better price would be foolish to say yes.
You mention being scared that he might show up and lock you out for failure to pay rent. The fact he didn't shows a little bit that he might not be the boogeyman portrayed.
I am sorry I never made it to your place or tried your beer.