So I am doing my due diligence and running a bunch of Wholesaling Calculator reports to decide on my maximum allowable offer ($53,260) in order to get my desired return ($10,000) and the flippers ($30,000).

Here's a link to a Texas title insurance premium calculator.  

Are there any tools/strategies to calculate a high appreciation market vs high cash flow market?   

Plus, some of the cost that you mentioned are not specifically for the deal and shouldn't be factored into the calculations to determine if THIS deal was a good/bad one (i.e the mastermind course, setting up your LLC, etc).

TIA for any guidance and considerations.  1)  I'm having difficulty finding a HELOC amortization calculator. 

Don’t fall for his free real estate calculator or any of his other free tools—many real estate gurus use the same tactics.

You seems to be on a conservative side, which is good, it means your project will be calculated and less likely to fail but being conservative means also missing out on opportunities based on being to hesitant. 

Dont distribute anything until your accountant does the tax calculation then reduce your partners final distribution accordingly 

Will the banks see the seller financing debt when calculating our DTI for the home equity?

To invest in real estate, set clear goals, consider your timeline and risk tolerance, learn about financing, analyze deals using rental property calculators, consider house hacking, network with investors, create a financial plan, stay educated on local market principles, and start small with a single-family rental or duplex.