If the tenant doesn't buy the house the option money and the excess rent payments are lost.

If the property has been sold at auction and the original owner is still within the 1 year redemption period, is there a way to receive excess funds back if the property is redeemed?

Then you may offer her enough money to make it fair in case she can collect the excess proceeds from the auction. 

Realtor fees are not excessive (unless you're not selling anything).  

The GENERAL (again depends on personal circumstances, but the majority of times) you don't want to hold any properties in a Corp because there's several downfalls regarding excess taxation and basis issues down the road. 

We understand this is a critical turning point in a long process, but [we] look forward to working with policy-makers and business owners to find state-level legislative solutions which promote fairness and competition.”This most recent case concerned the constitutionality of a 2016 South Dakota law requiring out-of-state sellers with sales in excess of $100,000, or with at least 200 separate sales transactions into the state, to collect and remit sales taxes.

I didn't think that it was something excessive to worry about but is this the case?

There are lots of expenses of owning a house that are in excess of your mortgage payment.  

I'm an investor, who will wholesale a property that doesn't fit my holding criteria or may be in excess of my capacity to rehab at the time.  

Doing this 5 times per year (my wife and I have a great W2 jobs and live in the inlaw unit of a rented 3/2 house) with our high excess active net income around +$5k / mo, I can see how this is achievable, unless I'm missing something?