But then, I also have a ferocious tight fisted gene. 

It may be tight, but it's doable. 

We recently got an 10 unit multifamily with a commercial space under contract in York, PA.

This will be a great resource once they get their sytems down etc.Also look for the bigger crowd funding portals to enter the space at least on a product that might be a little shorter term.

We are under a tight deadline so any help would be much appreciated.

I believe it is a tight for deals to flip on the MLS right now and more creative methods are working better. 

You can change the locks out yourself fairly easily, as long as everything fits up tight.  

The tenant came to us after seeing the space (and a sign in the window) and she wanted a build to suit salon put in.

Here are photos of the exterior of the house, there is concrete around the perimeter of the house and the entrance, budget is tight and have plenty to do inside so thinking of just repairing the concrete and staining it to give a natural stone look (taking out the concrete, dumpsters, labor and new pavers would be a big expense) However I read that newly poured concrete has to cure 90 days before you can stain it, is that accurate, also what is the estimated cost to stain outdoor concrete Per square foot?

Someone contacted me about buying their house and I do not even do that to rehab.The numbers are too tight.