Now if you submitted an offer at 75K on a 150K and I was the sellers agent I would drag you along on ignore until I got bored.

Please excuse my ignorance, but is that a determining factor in me taking ownership/possession of the trailers?

They didn't bother to send new bills to the "billing address" and instead sent them to tenants, who mostly ignored them. 

Am I supposed to ignore that and just go for it if everything else checks out??

In PA, assessed value has to be multiplied by a leveling factor set by the PA Department of Revenue to even be in the ballpark of what the market price is, so in most cases just ignore those for the purpose of setting a property value.

I feel very ignorant about how to purchase off-market things.

Therefore, should you (or anyone) completely ignore block-chain technology investing? 

Children are to be seen and not heard.Look, listen, scope things out, read, but by all means don't prove your ignorance by speaking it.

Usually people that own properties there are locals, people who are extremely wealthy and just rent out their lake house while they are working or gone, or ignorant California investors that think it's a great opportunity.

Ignore land for simplicity.