But Randy Richter is an excellent realtor who has helped us purchase our rental houses in Cedar Rapids.The rental inspections are fairly thorough, but not unreasonably picky in my experience.

I am trying to determine if I am being unreasonable or to impatient and looking for advice. 

I am tempted to be ruthless and request the late checkout amount in the Airbnb contract (2x the nightly stay), but it admittedly seems a little unreasonable.

You're being completely unreasonable and I would probably do the same thing your tenant is doing.

They do not take the time to know what a tenants needs really are let alone how to handle a tenant that might be overly needy or unreasonably demanding.Accounting — I have to audit the statements on a regular basis.  

If the time is reasonable and they do what they say then I allow it.If the time is unreasonable or they don't do what they say then I immediately start the eviction.I try and train them early that their are consequences for not paying on time.

If the tenant is not communicating with you, that falls under the "tenant unreasonably withholds consent" clause and you can post a notice on the door at least 12 hours in advance. 

Through various court battles and decisions, Jerry established the principle that due-on-sale clauses were an unreasonable restraint on alienation of property and therefore unenforceable, thereby enabling many sellers of homes to retain their homes and sell them, rather than lose them to lenders in foreclosure. 

I'm sure the GC would like to make at least 10 to 20% of the project costs which would tack on an extra $10k to $15k.With all of those assumptions, you can see why I don't think $70k is an unreasonable estimate for the project.As JScott recommends in his book, when estimating costs for projects you need to put together a detailed list of every repair and then price out each repair. 

Usually the only reason it did not sell is because of the unreasonable expectation by the seller of value.Market for properties in low income neighborhoods, look for vacant houses, send letters to non-occupant owners in those war zones, start with junk real estate, make offers to control them.