Some use BP tool here. 

You’ll find plenty of friendly, knowledgeable people willing to respond to your posts.The site has quite a few tools that can be helpful for new members.

After closing I want to borrow $20k from my relative to replenish my bank account so I can have buying power.

You are going to be much better off with that type of tool for real estate investing.  

Do you have any tools or resources that you use personally that you would be willing to share?

He cannot continue to bully and abuse his power on to anyone else.

Like iwill do all the handling from cleaning, answering to guests, bookings etc and I'll just pay my partner a percentage for letting me leverage her hosting power To run my airbnb business?

But, one thing I notice is none of these calculation tools account for time spent on a property.

This is a great place to learn and network.The site has quite a few tools that can be helpful for new members.

Thanks for sharing @Dan Powers I hadn't heard about the Amazon facility but that is huge.