Well anyone can write anything into a contract, but whether it is legal and enforceable is for the courts to decide...It is State law here that a contractor must call 811 or they are liable for the costs.

I won't just write them all here but I highly recommend contacting a qualified 1031 intermediary to walk you through the process.

Having people write Spark Investment checks for $25K, $50K, $100K and more.

Knows real estate tax write-offs and how I can best apply them!

(For example, when I confirm a booking, I repeat all the disclosed guests and dogs or put in "zero dogs" and request any changes to those details be made in writing in advance so everyone is clear.)

Someone with $10M in the bank in cash just needs to put a lot of money to work and time value and tax write off is more interesting to them than a hungry investor in their 20s that has never found a deal.Honestly, books are great, but they are about as "boiler plate" as you can get as I'm sure you're discovering.

A savings to put deposits and another account for everything elseyou don't need separate bank accounts as accounting software will classify all of those items.

Don't give up the pursuit.Fail fast works better in software than in real estate: reset the server, push a patch, etc. 

It is a tax write off.

Quote from @Theresa Harris: Get it in writing, change the locks, get the place listed and find new tenants.