That's different from a massive flood or a fire.

What size project in dollars?

hello, I have just bought a property that needs a) fumigation (section 1), b) landscape grading to improve drainage, c) crawspace/foundation work to repair some piers and fix sump pump, and d) minor interior remodel a...

By "professionally" I mean using my private capital, seeking out investors, and then loaning said capital to their projects on a regular basis. 

Finally, the last GC came in and he walked the property and offered to manage the project for me and would teach my how to be my own GC, so I would learn how to rehab using his subs.

What are you renting the house out for or what is the projected rents?

I have an opportunity to partner with a builder on a duplex project where I could get 25% of the net profit, however, the project won't be ready to sell until about this time next year. 

It could be a syndicate has ran it's course, a bad partnership, a divorce and a split of assets, investor is bringing investments closer to home, needs money for another project, etc.Sounds like you are competing with home buyers who will pay a premium and are fine with just a little built in equity.

That way you can still back out if the inspection shows massive costs to repairs, yet make the seller take your offer over others.

Particularly someone who I could open a line of credit with to make it easier to fund the repairs on projects without tying up my cash.