Our process server charges $40 within the city limits.

I believe Alexandria city allows it but portions of Fairfax county do not allow it. i would go option 1 personally. 

I have lived in Wisconsin and upstate New York in the past and have a decent amount of knowledge of those areas — but obviously need help.

Pad split is great but you need to be careful what cities you do it in cause it will bite you if done wrong 

I imagine there is a good level of demand for your services in a city like Nashville!

We haven't even discussed carriers raising their rates due to their reinsurance carriers increasing their rates, your building locations (CA, FL, NY, coastal counties/cities, etc.), how litigious is your state, your own loss history/ratio as an individual investor, the carrier's overall loss ratio in a certain state/area, the deductibles you've elected, etc. 

Let's assume that the neighborhood is a C class and the median income of the city is greater than 3X of the market rent.Here are some of the considerations I've come up with so far:- Units are in need of renovation and capex is too high or not available- Unit quality is not the same as market - Seller is worried about losing tenants due to increase- Vacancy rates are high or filling units have been difficult- Rent increase would take multiple increases over multiple lease periods to get to market rate if seller is trying to retain the same tenant- Seller inherited property and just want to liquidate- Seller needs to liquidate quickly (financial burden, sickness, quick exit from land-lording)It seems like I might be missing a warning sign about a deal if they are selling with current rents that are under market; but again, this seems to be most of the properties I've underwritten.And in the same vein, what should I be worried about when purchasing a deal with under market rent with the intention of raising them after purchase. 

Lost the major city and maybe the state.

I’m waiting to hear back from a city representative to see if it’s possible to divide the lot into multiple lots and put a mobile home on each lot.Once the land is paid off and divided, is it possible to use each lot as collateral for its individual mobile home? 

Out of your list, I suggest the Northern and Western cities you listed (Conroe, Montgomery, and Katy).