The unknowns I have had to learn the hard way are everything you can not see using one point in time (pre buy inspection); i.e. subfloor wood rot in your crawlspace that no one caught (even though 4 people were down there at different times), permits (have people pulled them in the past for big things that were done on the property), septic drain lines (septic tank was amazing, but the drain lines were faulty had to get a permit and get the city to do an inspection and called for a 7,500 repair and partial mound system to be installed....when the original inspection and pump was aok because it was a dry time of year)...., speaking of time of year, a HVAC unit that was inspected in the winter and the differential was AOK, was inspected for a closing in the summer and had to be completely replaced (4k-that I wasn't supposed to have to spend), drainage issues on the property and water intrusion......no body really inspects for drainage issues prior to closing, especially when it's a dryer time of year, then BOOM the rain hits and water is coming in over the foundation because water is not being routed correctly around the house.

Are there utilities that need to be installed for the conversion?

These are not totally run down, but these are clean and just have old carpets and tiles, kitchen cabinets, appliances, and etc.

The septic company should have a record of how often and when the last pumps and the health dept should have record of when it was installed. 

Good first:  In two houses I had experienced tiler and wood floor installers and I gave them free rent to install new floors through out. 

He liked how it looked and said as a DIY it wasn't bad to install.  

Does any one have idea how much it costs to have individual water lines and installing brand new gas lines?

I've always wondered how builders protect their product during build outs, especially once HVAC is installed, interior finishes are in progress, etc. 

In my case we didn't actually raise the roof itself, we just removed the ceiling joists, adding insulation in between the roof joists, and installed drywall.

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