Thanks @Frank Yang  the inspection report does not say anything wrong with the HVAC but states the age of the HVAC which is not consistent with the ad.

Hello,
I am new to forums and investing :). I wanted to see the best way to go about using a private lender to demolish an edifice and put a duplex on the property. The property is in Houston, TX.   
Thanks in advan...

Demo phase has been completed 5.

Thad, with what you have listed so far, I would recommend when you are speaking with software vendors, to have them show you a live demo of the features you are looking for - maintenance, ILS/MLS, available integrations, etc. - and ask questions regarding how that feature works compared to your current processes.

Purchasing a lot with a preexisting business, demoing it and building mid-rise condos.

They have a youtube and do live demos weekly I believe. 

This does not include the home, pouring a new pad, clubhouse, amenities, or cost to acquire and demo the existing community.

I pay the cost of the permits.To demo the whole house - $3,000 plus I pay for the dumpsters.New Roof - $3,000 Waterproof basement - busted up concrete and installed french drain system  fed into sump pump (kept existing sump pump) and water seal paint the inside (no outside work) $5,000.Frame whole house - $3,000 (basically basement and main level.. upstairs didn't really change)Drywall - delivered, hung, and finished - $32 per sheet he estimates 120 sheets needed ($3,840 total)Insulate all walls and attic - $1500(*) Rough electrical including permits,new panel & wire - $4000  (outlets, switches, cans, fixtures, etc. additional)(*) New duct work - $4,000 ... seems fairly simple with the house demo'd and being such a small house. 

We close today, and take possession next friday.anyway... meeting with my design team tonight... and we will begin demo on the 20th... 

After some thought, it seems like a reasonable cost for the full demo and abatement of the entire basement including removal of the debris etc.