I continually tried to set up a time to sit down with them and go over all the receipts and numbers to determine where everybody stood and they'd constantly cancel on me for one lame excuse after another because suddenly there was all the sudden nearly $7,000 of expenses they told me they also needed paid back for on top of the 22k.

@Tomasz KaminskiNot what you want to hear, but you're planning your trip without determining your destination.A house-hacking duplex and a 401k will not let you retire anytime soon.

If I’m looking at a MLS or on foreclosure.comHow can I determine more or less the rehabCost just by pictures?

Since all of the marriage joint is sealed by drywall, it is no way for the home appraisal to determine.

The most shocking inspection might be the first one and that determines when your S8 tenancy can begin.  

I drive a rusty Nissan Altima so mine is 250:1Here's how you can determine your ratio with a fictional example:$250,000 income: $10,000 Camry = 25:1

In either case, whether you decide to rent or to resell, first determine if the deceased owner had a will.   

I'll be collaborating with my financial planner to determine which investment vehicle is best to roll my 401k into.

I agree with Chris Coleman that determine what is worth  for you in terms of the cash flow from this house.

If you mess up on the return, your fellow member/partner can be upset and look for a remedy.Regarding the $30,000 in materials, you want to determine if the items are1) depreciated2) Currently expensed3) non-deductible