I completely get where you are coming from and I more than most think you should protect and value your time and efforts BUT I do think that there was some serious miscommunication between the two parties and that the escalation in price may have been in part due to the misunderstanding that the property was shovel ready when it in fact was not without your drawings.I imagine at this point you have already spoken to your lawyer but I would search for some middle ground on this as this doesn't from my point of view appear to be solely their mistake.

I cant imagine why anyone would invest in a location that is expected to be vacant 1 month every single year. 

I imagine the buyer was not paying the property taxes either.

But I imagine there are some judges who will agree that after 4 years occupancy, your walmart dirt devil will not suck up all the sh** you bring in on your shoes, even if the brown carpets look clean.

My two partners run their self owned properties out of their personal checking (but use quickbooks for accounting personal and business) and I run mine as a completely separate account.I cant imagine if we ran those in 'mixed accounts'.

I imagine that any lenders that will be able to do a 30 Year Fixed rate, will charge a higher rate then any of the three ARMS you mentioned, so you’d want to decide what is important to you...having a 30 Year fixed rate, and you pay a premium to the bank or go with one of the ARM loans offered and pay less interest to the bank?

I don't want to train my competition and I don't want the hassles of people whom you help but want their money back because they didn't work hard enough to get a deal.Sometimes, a good deed gets punished.This site is full of newbies who expect to get something for nothing.The world does not work like that.Can you imagine someone who wants to be a surgeon and wants to go through med school for free in a few days and wants to have a successful surgery and get paid $10,000 in 30 days?

I picked up a house from the court to fix and flip but I'm too busy to do it right now. Anyone out there interested in taking it off my hands.

Is to use a property management system online such as guests or ownerreservations Etc it automates or handles things you may not even imagine.

I imagine that is the case to a greater extent now.