When there is a recently acquired long-term rental, lenders can simply throw in the lease agreement and use 75% of the rental income from that, but on a short-term rental, there is no lease agreement, so the only way to document what the actual cash flow is, is by using Schedule E of your most recent tax return filing. 

OP should have rock-solid comp's for ARV BEFORE entering flip.

Show people what the investment looks like over the life cycle otherwise people simply don't have enough information to go off of.

Get a lender, enter into contract, close escrow, enjoy your new home. if you have less than 30 days, you would need the seller's cooperation to contact the foreclosing entity to see if they will postpone to give you time to close the deal. it's not guaranteed and the lender is under no obligation to do so but if everyone wins (seller sells, lender gets paid off in full, you get a home), most lenders will provide a small window of time to get it done.

Finally, how to trust a JV and even a checklist of things to go through before entering a JV relationship.

The affordable housing market and diverse neighborhoods make it easy to enter.

PM isn't a great place to simply save money- it's a 24/7 job and there's huge liability if you don't know what you are doing.

He simply wears me out with his contempt. 

They are not your tenants they are occupying your property you have no reason to work with them you simply be nice and ask them to pack up and go.

Or are you able to stick to your guns and simply tell the tenant, tough crap, the lease is the lease.