My land contract has a provision that says if they miss 2 payments the contract is void and any money received is treated as rent.You have to send them a 30 day notice I believe stating that you are cancelling the contract due to breach of contract.

Although there was no elevated humidity or surface areas affected with mold, several of the air samples came back with very elevated levels.Almost immediately upon receiving this notice we offered to let them break their lease without penalty.

Notice the cars that are parked and if people that are walking around seem friendly or if young families are there or not. 

I would let them start, if you are taking it next week then it is probably just the notices, so ask for copies of the notices that they sent to the tenant as a condition of closing.

I don't think it's worth using a fannie mae loan as I can use my 10 fannie mae loans for higher value  properties. 

A lot of these numbers Brandon says to just do a combination of knowledge, quick online research and rough estimate:Purchase price: $259,900 (this is pretty simple but I noticed in other BP's videos they will change the purchase price, either lower or higher, is there rhyme/reason to this?)

No excuses--no "I didn't notice/read/understand that part".Should those be repaired? 

There are two reasons you often hear about cash purchases in correlation to BRRRR:1) Often the properties are uninhabitable and don't qualify for conventional Fannie/Freddie financing2) You would then have two sets of loan costs (purchase and refinance) versus just the refinance portion

I also noticed that the front/back porch and enclosed garage were appraised at $29sq/ft ( considering everything was build as a part of the house by the same construction builder it doesn’t make sense to me) Also: my house was built in 2010 and comparables were 2009-2013 range!

Same with water and sewer,  you pay water by unit which is around 50/month per unit so you'd be paying 2400/year.Also I noticed you didn't mention any debt servicing so I'm assuming you are paying cash for this property?