I had them installed during the remodel up there.The first floor where my wife and I currently occupy is also recently updated with a new kitchen, all new appliances and is also a 2 bedroom with a fully finished basement.

Keep in mind, you will likely have to install a sprinkler system, among making other changes for the home to be used for that purpose.

HVAC duct work insulation is also deteriorated.No vapor barriers installed eitherSome fungi/mold growth notedPlumbingMultiple small leaks under sinks and from bathtub and toilets.House has Polybutylene plastic plumbing which is dangerousMain shut off valve is damagedElecticalSome small exposed wiring and bad splicing.Whole house has no GFCI's or grounding outletsInteriorMoisture spots on ceilingExteriorLose Vinyl SidingDoor Jams and Window trim have moisture damageDriveway need replacementRoofingMinor leaks noted in atticRecommended to replace roof covering, but not whole roofSome fungi growth noted in roofSo some of the question I am trying to tackle with this work is:How much should I budget for the main issues listed? 

I know someone who installs security systems.

I’ve found that as long as they’re somewhat insulated and well installed the color won’t matter.

I tried to estimate what a GC might cost in my calculations, but I have an uncle who does roofing and cousins with window installation and landscaping businesses, so I believe I can save some significant costs through their help and guidance. 

In a lot of cases, there was a drainage system installed but it was not properly maintained and therefore doesn't work. 

There were a few other things I believe which are destroyed including carpet which was newly installed a week before she moved in, but b/c it is 7 years, I can't do anything about it from what I read on this forum and other people asking these questions. 

Since then, he has had to replace the windows (the seals got old) and now he has to install all new plumbing.

I.e. for carpenters, knowing how many doors need installed, all trim installed, addition of quarter rounds AFTER floors are refinished, wood filling of all nail holes and caulking of all gaps in trim.Tile installers: installation of wonder board, with all seams taped and cemented.