Insurers are looking at more than terrain, it's building, materials, electrical, plumbing, and roofs. 

Learning how to use the correct tools and materials for a job, YouTube videos and even ChatGPT will help you get through 80% of the problems you will run into.My rule was I would not mess with HVAC, plumbing and electrical Or if it would take more than a few hours. 

I found it to be a great vehicle while I was working a W2 job as an engineer.  

We had to do a lot of electrical work, bathroom, kitchen rehab, total paint and a new roof.

I have two options 6.625% 30 year or 6.15% 15 yearI want to invest aggressively in the near future on more propertiesThe loan is only $110k and the monthly payment for 15 year is $563 and $750I will earn 2-3k a month in gross rental revenueThe property is in a declining population areaRecently rennovated, and all major things were relatively recently improved such as plumbing, the roof, a/c, electric, etc.Will require a lot of management as it is rent by the room so I may switch to a normal rental after 10 yearsI'm trying to find what will mathematically net me the most money in the long run.

They'd also probably be more aware of how much water, gas, or electric they are using when they have to pay the bill after each cycle.  

You may have to search a bit for the right contractor or engineer - sometimes I see one solution dominating in an area - "that is how we always do it" 

The roof, AC, plumbing, electrical and flooring will eventually need replacements.

Borrowing costs are nearing their highest point in decades and the municipal and state debt crises do not get nearly the attention of the federal government or deserve.Environmental Impacts : My assumption is that the entire toxic debris removal process will have to be managed by the Army Corp of Engineers X FEMA and other governmental agencies.

Who are their architects, engineers, and contractors.