I currently work as an engineer and project manager in the healthcare industry.

We use Carrier and Trane for commercial projects, I would say look for a reputable service company for installation, or through referral. 

Depends if it is a permanent partnership or a partnership per project.

Then if the project sells in 10-months which is not uncommon in my market where permits can take way too long, you pay an addition 4 pts in extension fees.

Be happy with the niche you select and know the market well too, especially the best locations.Always remember to do a math analysis and try to look at all prospective properties before you make an offer or at least have a clause in the sales contract that gives you some time (about 10 days) to make a detailed inspection and possibly back out of the deal without much of a penalty that will hurt you too much.  

I have a large historical commercial property that I am starting a rehab on and am in need of a skilled carpenter/framer. Any help would be greatly appreciated. 

How do you Find buyers in your area and market for your projects when your new to the business with a very small marketing budget and tons of deals on the table.

It took nearly a year to work through the bureaucracy and finish the project and he sold it to a person from Brooklyn.  

People will eventually want to give you money to invest into your projects and you don't want to come across as a materialistic flashy person. 

I will probably keep working for another year or two to get the seed money(and financing options, as necessary) to fund my next few projects.