While this won't help you necessarily be awarded more deals, it will certainly help limit how much time you are spending on most deals.  

Looking for advice on vetting properties that are good or bad candidates for doing a pop top on.Is there an age limit to a home that you want to stay under when doing these?

d) set mouse traps and check them often (not a set it and forget it option and dead animals can stink, hard to check traps in a crawlspace regularly no?)

In many cases the DCR is limiting refinances to lower LTV's.

It's totally set up for STR.

So, that can potentially limit your buyers when/if you go to sell. 

I have a CGL policy, but it would be nice to have some protection if the occupants set it on fire. 

@Anthony ErvinMost counties have online property tax calculators.Investors need to know how their communities determine property taxes.Some counties and states have set schedules every 3 4 or 5 years to re-assess properties.

Legal issues in setting up this type of business at your location?

I am currently 19 years old and I have just finished my training and getting set up with my broker.