And maybe diversify a little, invest half in a low cost S&P500 fund like VOO and the split the rest across 2 or 3 syndications.

If that is one of the only contractors and the lien is considerable that’s another story - but not enough info to tell

They are even working on getting me the evicted tenant's security deposit, the missing JANUARY rent since the place is still empty, and covering the cost of my own manager re-listing the property.

Here's an article with additional FAQs on cost segregation studies that you may find helpful.

Yup, property condition, vintage, neighborhood, tenant base, property management are all very important considerations. 

Cost segregation can be utilized for many different scenarios such as new construction, properties already owned and newly purchased properties.

I can imagine it is considerably more work as well as I plan to manage myself.

The amount you'll save off of the purchase price will be significantly more than what the vacancy will cost.

Quote from @Hanna Brown: @Jay Hinrichs If the bidder at the auction pays cash for keys to get the homeowner out, does the person redeeming from the owner position (exercising rights of redemption w/in 180 days) have to reimburse them for those costs they paid to get the homeowner out? 

Replacing one bad fixture between material and labor can end up being 3X the cost of buying the better quality fixture in the first place.