I also have a 9 year background in construction in various aspects; estimating, project management, project controls, etc.I am here to learn, grow, and help.

I always want to provide my clients with detailed explanations of options when buying or selling so they (with my guidance) can make informed decisions that will be the best option for the results they are seeking.I have never done a RE transaction with seller financing.

there is a loan disclosure at the bottom of the CD that reads escrow account: $5277.03 says right next to it estimated total amount over 1 year escrowed property cost:Property taxes, homeowners insurance. mortgage insurance.

I have these below. https://www.kwikset.com/products/details/electronic-locks/910trl-zbc4-15-smt.aspx

The property is currently generating between $2500 - $2,800 monthly but we estimate the pro forma income to be $3500 once offices and RV spaces are leased.

Estimated rehab is $175,000.I was able to negotiate the price down to $230,000 and the ARV is $600,000, so luckily, there's a lot of meat on the bone.At one end of the house, there's a big leak in the roof and that wall seemed to be sagging as the door in that wall was jammed shut. 

Of course it will probably never be perfectly 50/50, but do you think that’s a low estimation or high estimation for extra expenses on a property?

Based on what other places are rented for in this area, the rental income will likely cover more than half of our estimated monthly fee (mortgage, property taxes, etc.)I'm wondering if anyone who owns a property in this area has dabbled in AirBnB and what their experience has been like?

On the BiggerPockets Rental Property Calculator there is a section known as Loan Detail.  

Read this threads on partnering: How to Effectively Conduct Joint Venture Agreements as a Real Estate Investorhow-do-i-properly-construct-a-purchase-with-a-partnershiphttps://www.biggerpockets.com/forums/51/topics/591...Taking-on-partner-s-and-limiting-our-liabilitesQuestions-for-capital-partners/Real-estate-partnership-questions/And here is a diagram to help guide you on this quest - talk with @Scott Smith to get implementation details: