Even if you understand all of that, frequently I've seen people, and their attorneys, who clearly don't have an interest in the property, claim that they do and are willing to go to court to prove it. 

I believe his words were something along the lines of, "Do not getting into a flip right now unless you are an expert" (he even claimed he did not know enough to do so).

Would I be able to claim the exclusion of gain for my primary residence and claim a partial exclusion for my renal or vise versa?

I had this happen with a wells fargo where there was a subordination recorded but they sued claiming it was done in ERROR that one cost me 40k to settle. 

I'm planning to send them to small claims for that.

Oh excuse me- quick claim.

I suggest you start by contacting a real estate attorney and start the eviction process so that your claim is in line with the thousands of others when the courts open back up.You should also look into the mortgage forbearance options that you have that seem to allow you to push up to 90 days of mortgage payments to possibly the end of the fixed term of the note.Good luck!

I would then file in small claims(JP Court). 

I know the news shows the cities desperate for medical personnel, but in many places the surge has not hit.

One way of knowing if you can make good money is to know if your state requires a occupational license like Realtors, Electrician, Etc... otherwise any body can claim to be an inspector.