If the lines were replaced/updated at any time...great, but I bet the drains weren't, and the underground is crumbling, or will, or has been.5 - Plaster walls. 

And, again, contractors know how to work with what is there (basically it's a "leave it alone" deal) and go around it with newer materials.If you do test for either lead or asbestos, the seller is not responsible for any repair/replacement.

going to add a carport and replace kitchen cabinets besides the lot division.

The replacement property will go in my single-member holding LLC. 

With the property, I know the previous owner who sold it to the current owner and that was between 2 and 3 years ago and only had to replace a single window to sell the house.

Things such as flooring, cabinets, countertops, paint colours, etc... that would look nice and modern. 

My policy currently includes extended replacement cost coverage and building code upgrade coverage and also includes premise liability, workers comp, personal injury, and water backup and sum discharge or overflow.

My area it is $6 sf to replace. $3 for the flooring and $3 for ripping up old and installing. $6000/10 year life span/12 months in a year= $50 per month for 1 item.

Also one has to look at what your trying to accomplish are you trying to replace your current job / income with changing careers into being a full time landlord.. or are you simply investing and building a long term portfolio  kind of like Day trading or just set it and forget it stocks and other passive investments.  

Roofer came back out and looked it over, sealed them with some type of clear water sealant, and said the flashing and everything looked good -- but they continue to leak and the leaks are getting worse with each storm.Question: how do I find the right person to replace these skylights?