You are presumably selling this for $115K (around the 70% of ARV area), a gross spread of $35K.

I'll presume you don't have an agent involved, but that person would likely shoot some photos for you.

I presume the lender is hands-off with the DOT or promissory note as this is outside the scope of their purview.

What notice do I need to give here and what is the best way to avoid conflict (I presume she is not going to be happy about the notice).

BPO is property value, a rather straight forward idea I am presuming.  

I am looking at a 115k property for which the PMI would be $40/month because I'm putting 5% down.On one hand, I could pay the PMI up-front for about $3,300 and increase monthly cashflow by $40, as well as save about $1,500 overall ($40 x 10 years is $4,800).On the other hand, I could pay the $40/month PMI for 10 years and have $3,300 more RIGHT NOW which I could then presumably put towards acquiring another property and expedite that process.So, what's the best way to analyze this given my goal of wanting to achieve 3k in passive income in the next 5-7 years?

Aside from that, I presume the seller is insolvent, because he's been in pre-foreclosure since March of last year.

I presume by the mobile home owners.

The law considers 24 hours advance written notice to be reasonable in most situations.If the notice is mailed to the tenant, mailing at least six days before the intended entry is presumed to be reasonable, in most situations.

Presumably the rule that most SFR lots can now accomodate 2 ADU's  in addition to primary home (either 1 DADU and one ADU or 2 ADUs) and owner occupancy is no longer required.